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All sourcesNASA NTRSDOE OSTI
NASA NTRS2004

Endemic Mo Isotopic Anomalies in Iron and Carbonaceous Meteorites

Mo in refractory interstellar grains shows large isotope anomalies. Recent Mo studies showed isotope effects in Allende and Murchison, and in iron meteorites, mesosiderites, and pallasites. Excesses of p- and r-process isotopes (or depletion of sprocess isotopes) of up to 3.5 epsilon units (epsilon u=parts in 10(exp 4)) were reported. We have reported on endemic isotope anomalies in Ru. Other workers have resolved no isotope anomalies for Mo or Ru and have claimed that the work by others is incorrect. Because Ru isotopes can interfere at Mo-96, Mo-98, Mo-100, we improved the chemical separations and eliminated interferences. For Mo work, we used the same solutions from which we separated and analyzed Ru. Three of the iron meteorites (Coahuila, Cape York, and Cape of Good Hope) were chosen for their large Mo isotopic effects. Mo was loaded on outgassed Re filaments, and then reduced; we used Ba(OH)2-NaOH as emitter, and measured Mo in static mode, as MoO3(-). We used Mo-98/Mo-96 for the mass fractionation correction (exponential law). No interferences from Ru or Zr isotopes were detected using the electron multiplier and no corrections were needed. For results on Mo standards we show 2 sigma(not 2 sigma mean) external precision better than: 0.7 epsilon u for Mo-94/Mo-96 and Mo-95/Mo-96; 1.0 epsilon u for Mo-92/Mo-96 and Mo-97/Mo-96; 1.4 epsilon u for Mo-100/Mo-96. Reproducibility for Mo standards is shown as contours (blue lines).

Chen, J. H.↗
DOE OSTI2020

Materials Data on UMo2O11 by Materials Project

UMo2O11 crystallizes in the monoclinic C2/c space group. The structure is two-dimensional and consists of six UMo2O11 sheets oriented in the (1, 0, 0) direction. U is bonded in a distorted pentagonal bipyramidal geometry to seven O atoms. There are a spread of U–O bond distances ranging from 1.79–2.50 Å. Mo is bonded in a 6-coordinate geometry to six O atoms. There are a spread of Mo–O bond distances ranging from 1.71–2.32 Å. There are six inequivalent O sites. In the first O site, O is bonded in a single-bond geometry to one Mo atom. In the second O site, O is bonded in a single-bond geometry to one U atom. In the third O site, O is bonded in a bent 150 degrees geometry to one U and one Mo atom. In the fourth O site, O is bonded in a distorted trigonal planar geometry to one U and two equivalent Mo atoms. In the fifth O site, O is bonded in a single-bond geometry to one Mo atom. In the sixth O site, O is bonded in a distorted trigonal non-coplanar geometry to one U and two equivalent Mo atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on UMo5O16 by Materials Project

UMo5O16 crystallizes in the monoclinic P2 space group. The structure is three-dimensional. U6+ is bonded to eight O2- atoms to form corner-sharing UO8 hexagonal bipyramids. There are a spread of U–O bond distances ranging from 2.06–2.46 Å. There are three inequivalent Mo+5.20+ sites. In the first Mo+5.20+ site, Mo+5.20+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Mo–O bond distances ranging from 1.74–2.39 Å. In the second Mo+5.20+ site, Mo+5.20+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Mo–O bond distances ranging from 1.74–2.38 Å. In the third Mo+5.20+ site, Mo+5.20+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Mo–O bond distances ranging from 1.75–2.38 Å. There are nine inequivalent O2- sites. In the first O2- site, O2- is bonded in a bent 150 degrees geometry to two Mo+5.20+ atoms. In the second O2- site, O2- is bonded in a distorted single-bond geometry to two equivalent Mo+5.20+ atoms. In the third O2- site, O2- is bonded in a distorted single-bond geometry to two equivalent Mo+5.20+ atoms. In the fourth O2- site, O2- is bonded in a linear geometry to two equivalent U6+ atoms. In the fifth O2- site, O2- is bonded in a distorted linear geometry to two equivalent Mo+5.20+ atoms. In the sixth O2- site, O2- is bonded in a distorted trigonal planar geometry to one U6+ and two Mo+5.20+ atoms. In the seventh O2- site, O2- is bonded in a 3-coordinate geometry to one U6+ and two Mo+5.20+ atoms. In the eighth O2- site, O2- is bonded in a distorted linear geometry to two Mo+5.20+ atoms. In the ninth O2- site, O2- is bonded in a distorted trigonal planar geometry to one U6+ and two Mo+5.20+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on U2Si4Mo3 by Materials Project

U2Mo3Si4 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. U3+ is bonded to seven Si4- atoms to form distorted USi7 pentagonal bipyramids that share corners with four equivalent MoSi6 octahedra, corners with six equivalent USi7 pentagonal bipyramids, corners with five equivalent MoSi6 pentagonal pyramids, edges with three equivalent USi7 pentagonal bipyramids, edges with two equivalent MoSi6 pentagonal pyramids, faces with two equivalent MoSi6 octahedra, faces with two equivalent USi7 pentagonal bipyramids, and faces with four equivalent MoSi6 pentagonal pyramids. The corner-sharing octahedra tilt angles range from 46–53°. There are a spread of U–Si bond distances ranging from 2.81–2.96 Å. There are two inequivalent Mo+3.33+ sites. In the first Mo+3.33+ site, Mo+3.33+ is bonded to six Si4- atoms to form distorted MoSi6 pentagonal pyramids that share corners with three equivalent MoSi6 octahedra, corners with five equivalent USi7 pentagonal bipyramids, corners with four equivalent MoSi6 pentagonal pyramids, edges with two equivalent USi7 pentagonal bipyramids, edges with four equivalent MoSi6 pentagonal pyramids, faces with two equivalent MoSi6 octahedra, and faces with four equivalent USi7 pentagonal bipyramids. The corner-sharing octahedra tilt angles range from 40–42°. There are a spread of Mo–Si bond distances ranging from 2.51–2.63 Å. In the second Mo+3.33+ site, Mo+3.33+ is bonded to six Si4- atoms to form MoSi6 octahedra that share corners with four equivalent MoSi6 octahedra, corners with eight equivalent USi7 pentagonal bipyramids, corners with six equivalent MoSi6 pentagonal pyramids, faces with four equivalent USi7 pentagonal bipyramids, and faces with four equivalent MoSi6 pentagonal pyramids. The corner-sharing octahedral tilt angles are 50°. There are a spread of Mo–Si bond distances ranging from 2.63–2.68 Å. There are two inequivalent Si4- sites. In the first Si4- site, Si4- is bonded in a 9-coordinate geometry to three equivalent U3+, five Mo+3.33+, and one Si4- atom. The Si–Si bond length is 2.58 Å. In the second Si4- site, Si4- is bonded in a 9-coordinate geometry to four equivalent U3+, four Mo+3.33+, and one Si4- atom. The Si–Si bond length is 2.52 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on U2(Mo3Se4)5 by Materials Project

U2(Mo3Se4)5 crystallizes in the triclinic P-1 space group. The structure is three-dimensional. there are two inequivalent U3+ sites. In the first U3+ site, U3+ is bonded in a body-centered cubic geometry to eight Se2- atoms. There are a spread of U–Se bond distances ranging from 2.85–3.10 Å. In the second U3+ site, U3+ is bonded in a body-centered cubic geometry to eight Se2- atoms. There are a spread of U–Se bond distances ranging from 2.85–3.09 Å. There are fifteen inequivalent Mo+2.27+ sites. In the first Mo+2.27+ site, Mo+2.27+ is bonded to five Se2- atoms to form a mixture of corner and edge-sharing MoSe5 square pyramids. There are a spread of Mo–Se bond distances ranging from 2.54–2.73 Å. In the second Mo+2.27+ site, Mo+2.27+ is bonded to five Se2- atoms to form a mixture of corner and edge-sharing MoSe5 square pyramids. There are a spread of Mo–Se bond distances ranging from 2.56–2.78 Å. In the third Mo+2.27+ site, Mo+2.27+ is bonded to five Se2- atoms to form a mixture of corner and edge-sharing MoSe5 square pyramids. There are a spread of Mo–Se bond distances ranging from 2.55–2.76 Å. In the fourth Mo+2.27+ site, Mo+2.27+ is bonded to five Se2- atoms to form a mixture of corner and edge-sharing MoSe5 square pyramids. There are a spread of Mo–Se bond distances ranging from 2.54–2.76 Å. In the fifth Mo+2.27+ site, Mo+2.27+ is bonded to five Se2- atoms to form a mixture of corner and edge-sharing MoSe5 square pyramids. There are a spread of Mo–Se bond distances ranging from 2.54–2.76 Å. In the sixth Mo+2.27+ site, Mo+2.27+ is bonded to five Se2- atoms to form a mixture of corner and edge-sharing MoSe5 square pyramids. There are a spread of Mo–Se bond distances ranging from 2.55–2.77 Å. In the seventh Mo+2.27+ site, Mo+2.27+ is bonded to five Se2- atoms to form a mixture of corner and edge-sharing MoSe5 square pyramids. There are a spread of Mo–Se bond distances ranging from 2.55–2.76 Å. In the eighth Mo+2.27+ site, Mo+2.27+ is bonded to five Se2- atoms to form a mixture of corner and edge-sharing MoSe5 square pyramids. There are a spread of Mo–Se bond distances ranging from 2.55–2.76 Å. In the ninth Mo+2.27+ site, Mo+2.27+ is bonded to five Se2- atoms to form a mixture of corner and edge-sharing MoSe5 square pyramids. There are a spread of Mo–Se bond distances ranging from 2.56–2.76 Å. In the tenth Mo+2.27+ site, Mo+2.27+ is bonded to five Se2- atoms to form a mixture of corner and edge-sharing MoSe5 square pyramids. There are a spread of Mo–Se bond distances ranging from 2.54–2.73 Å. In the eleventh Mo+2.27+ site, Mo+2.27+ is bonded to five Se2- atoms to form a mixture of corner and edge-sharing MoSe5 square pyramids. There are a spread of Mo–Se bond distances ranging from 2.55–2.76 Å. In the twelfth Mo+2.27+ site, Mo+2.27+ is bonded to five Se2- atoms to form a mixture of corner and edge-sharing MoSe5 square pyramids. There are a spread of Mo–Se bond distances ranging from 2.53–2.75 Å. In the thirteenth Mo+2.27+ site, Mo+2.27+ is bonded to five Se2- atoms to form a mixture of corner and edge-sharing MoSe5 square pyramids. There are a spread of Mo–Se bond distances ranging from 2.54–2.73 Å. In the fourteenth Mo+2.27+ site, Mo+2.27+ is bonded to five Se2- atoms to form a mixture of corner and edge-sharing MoSe5 square pyramids. There are a spread of Mo–Se bond distances ranging from 2.54–2.76 Å. In the fifteenth Mo+2.27+ site, Mo+2.27+ is bonded to five Se2- atoms to form a mixture of corner and edge-sharing MoSe5 square pyramids. There are a spread of Mo–Se bond distances ranging from 2.55–2.77 Å. There are twenty inequivalent Se2- sites. In the first Se2- site, Se2- is bonded in a 1-coordinate geometry to one U3+ and three Mo+2.27+ atoms. In the second Se2- site, Se2- is bonded in a 1-coordinate geometry to one U3+ and three Mo+2.27+ atoms. In the third Se2- site, Se2- is bonded in a 1-coordinate geometry to one U3+ and three Mo+2.27+ atoms. In the fourth Se2- site, Se2- is bonded in a 6-coordinate geometry to three Mo+2.27+ atoms. In the fifth Se2- site, Se2- is bonded in a 1-coordinate geometry to one U3+ and three Mo+2.27+ atoms. In the sixth Se2- site, Se2- is bonded in a 5-coordinate geometry to one U3+ and four Mo+2.27+ atoms. In the seventh Se2- site, Se2- is bonded in a 5-coordinate geometry to one U3+ and four Mo+2.27+ atoms. In the eighth Se2- site, Se2- is bonded in a 4-coordinate geometry to four Mo+2.27+ atoms. In the ninth Se2- site, Se2- is bonded in a 5-coordinate geometry to one U3+ and four Mo+2.27+ atoms. In the tenth Se2- site, Se2- is bonded in a 5-coordinate geometry to one U3+ and four Mo+2.27+ atoms. In the eleventh Se2- site, Se2- is bonded in a 5-coordinate geometry to one U3+ and four Mo+2.27+ atoms. In the twelfth Se2- site, Se2- is bonded in a 4-coordinate geometry to four Mo+2.27+ atoms. In the thirteenth Se2- site, Se2- is bonded in a 5-coordinate geometry to one U3+ and four Mo+2.27+ atoms. In the fourteenth Se2- site, Se2- is bonded in a 5-coordinate geometry to one U3+ and four Mo+2.27+ atoms. In the fifteenth Se2- site, Se2- is bonded in a 5-coordinate geometry to one U3+ and four Mo+2.27+ atoms. In the sixteenth Se2- site, Se2- is bonded in a 5-coordinate geometry to one U3+ and four Mo+2.27+ atoms. In the seventeenth Se2- site, Se2- is bonded in a 5-coordinate geometry to one U3+ and four Mo+2.27+ atoms. In the eighteenth Se2- site, Se2- is bonded in a 5-coordinate geometry to one U3+ and four Mo+2.27+ atoms. In the nineteenth Se2- site, Se2- is bonded in a 5-coordinate geometry to one U3+ and four Mo+2.27+ atoms. In the twentieth Se2- site, Se2- is bonded in a 4-coordinate geometry to four Mo+2.27+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on UCu(Mo2O9)6 by Materials Project

U(Mo2O7)6CuO12 is Modderite-like structured and crystallizes in the trigonal R-3 space group. The structure is zero-dimensional and consists of three CuO12 clusters and three U(Mo2O7)6 clusters. In each CuO12 cluster, Cu is bonded in an octahedral geometry to six equivalent O atoms. All Cu–O bond lengths are 2.19 Å. There are two inequivalent O sites. In the first O site, O is bonded in a single-bond geometry to one O atom. The O–O bond length is 1.22 Å. In the second O site, O is bonded in a distorted bent 120 degrees geometry to one Cu and one O atom. In each U(Mo2O7)6 cluster, U is bonded in a cuboctahedral geometry to twelve O atoms. There are six shorter (2.43 Å) and six longer (2.46 Å) U–O bond lengths. There are two inequivalent Mo sites. In the first Mo site, Mo is bonded in a 6-coordinate geometry to six O atoms. There are a spread of Mo–O bond distances ranging from 1.73–2.38 Å. In the second Mo site, Mo is bonded in a 6-coordinate geometry to six O atoms. There are a spread of Mo–O bond distances ranging from 1.73–2.34 Å. There are seven inequivalent O sites. In the first O site, O is bonded in a distorted rectangular see-saw-like geometry to one U and three Mo atoms. In the second O site, O is bonded in a single-bond geometry to one Mo atom. In the third O site, O is bonded in a single-bond geometry to one Mo atom. In the fourth O site, O is bonded in a single-bond geometry to one Mo atom. In the fifth O site, O is bonded in a single-bond geometry to one Mo atom. In the sixth O site, O is bonded in a distorted rectangular see-saw-like geometry to one U and three Mo atoms. In the seventh O site, O is bonded in a water-like geometry to two Mo atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on U(MoO5)12 by Materials Project

U(MoO4)12(O2)6 crystallizes in the trigonal R-3 space group. The structure is zero-dimensional and consists of three hexaoxane molecules, six trioxirane molecules, and three U(MoO4)12 clusters. In each U(MoO4)12 cluster, U is bonded in a cuboctahedral geometry to twelve O atoms. There are six shorter (2.40 Å) and six longer (2.51 Å) U–O bond lengths. There are two inequivalent Mo sites. In the first Mo site, Mo is bonded in a 6-coordinate geometry to six O atoms. There are a spread of Mo–O bond distances ranging from 1.72–2.32 Å. In the second Mo site, Mo is bonded in a 6-coordinate geometry to six O atoms. There are a spread of Mo–O bond distances ranging from 1.73–2.35 Å. There are eight inequivalent O sites. In the first O site, O is bonded in a single-bond geometry to one Mo atom. In the second O site, O is bonded in a single-bond geometry to one Mo atom. In the third O site, O is bonded in a single-bond geometry to one Mo atom. In the fourth O site, O is bonded in a single-bond geometry to one Mo atom. In the fifth O site, O is bonded in a single-bond geometry to one O atom. The O–O bond length is 2.04 Å. In the sixth O site, O is bonded in a distorted rectangular see-saw-like geometry to one U and three Mo atoms. In the seventh O site, O is bonded in a water-like geometry to two Mo and one O atom. In the eighth O site, O is bonded in a distorted rectangular see-saw-like geometry to one U and three Mo atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2023

Molybdenum sulphide clusters as redox-active supports for low-valent uranium

The preparation of an actinide substituted cubane cluster, (Cp* 3 Mo 3 S 4 )Cp*UI 2 , and its reduced derivatives are reported. Structural and spectroscopic investigations provide insight into the unique interactions between the actinide and its redox-active molybdenum sulphide metalloligand, serving as a model to study atomically-dispersed, low-valent actinide ions on MoS 2 surfaces. To probe the ability of the assembly to facilitate multielectron small molecule activation, the reactivity of the fully-reduced cluster, (Cp* 3 Mo 3 S 4 )Cp*U, with azobenzene was investigated. Addition of the substrate results in the formation of a cis-bis-imido cluster, (Cp* 3 Mo 3 S 4 )Cp*U(=NPh) 2 . Here, cooperative reactivity between the actinide and redox-active support facilitates the 4e − -reduction of substrate.

Patra, Kamaless↗
DOE OSTI2023

Molybdenum-99 from Molten Salt Reactor as a Source of Technetium-99m for Nuclear Medicine: Past, Current, and Future of Molybdenum-99

Technitium-99m ( 99m Tc), a widely used radioisotope, is used in tens of millions of medical diagnostic procedures annually. However, it is hard to store and must be immediately used upon production due to its short half-life (i.e., 6 h); thus, it is currently produced from 99 Mo, which itself is a result of 235 U fission. The majority of 99 Mo supplies to U.S. patients are currently provided by foreign producers and produced using highly enriched uranium (HEU). In order to minimize the proliferation risks of HEU-based medical isotope production, the U.S. Department of Energy’s National Nuclear Security Administration has funded a program to accelerate the development of technologies to produce 99 Mo without the use of HEU. Today, the global supply of 99 Mo depends on a limited number of nuclear reactors, and production has been interrupted unexpectedly since 2009 due to the fleet’s advanced age. Herein, alternative options for 99 Mo production are discussed, and one potential option is to obtain 99m Tc from molten salt reactors (MSRs). A MSR is a nuclear fission reactor that can operate at or close to atmospheric pressure with liquid fuel, which allows for producing isotopes in a timely manner. In this paper, the past and current production of 99 Mo via nuclear reactors is described, and the future of 99 Mo production by MSRs is discussed. The behavior and chemical properties of molybdenum in fluoride salts in MSRs and the possible extraction methods are also examined in addition to the limitation of current studies.

21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS↗
DOE OSTI2020

Materials Data on UMoO5 by Materials Project

UMoO5 crystallizes in the orthorhombic Pcca space group. The structure is three-dimensional. U4+ is bonded to seven O2- atoms to form a mixture of edge and corner-sharing UO7 pentagonal bipyramids. There are a spread of U–O bond distances ranging from 2.07–2.43 Å. Mo6+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Mo–O bond distances ranging from 1.74–2.39 Å. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a 3-coordinate geometry to two equivalent U4+ and one Mo6+ atom. In the second O2- site, O2- is bonded in a distorted single-bond geometry to two equivalent Mo6+ atoms. In the third O2- site, O2- is bonded in a linear geometry to two equivalent U4+ atoms. In the fourth O2- site, O2- is bonded in a 3-coordinate geometry to one U4+ and two equivalent Mo6+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on U(Mo3S4)2 by Materials Project

U(Mo3S4)2 crystallizes in the trigonal R-3 space group. The structure is three-dimensional. U4+ is bonded in a body-centered cubic geometry to eight S2- atoms. There are two shorter (2.74 Å) and six longer (2.94 Å) U–S bond lengths. Mo2+ is bonded to five S2- atoms to form a mixture of edge and corner-sharing MoS5 trigonal bipyramids. There are a spread of Mo–S bond distances ranging from 2.42–2.59 Å. There are two inequivalent S2- sites. In the first S2- site, S2- is bonded in a 4-coordinate geometry to one U4+ and three equivalent Mo2+ atoms. In the second S2- site, S2- is bonded in a 5-coordinate geometry to one U4+ and four equivalent Mo2+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on UMoO6 by Materials Project

UO2MoO4 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. U6+ is bonded to seven O2- atoms to form distorted UO7 pentagonal bipyramids that share corners with two equivalent UO7 pentagonal bipyramids and corners with four equivalent MoO4 tetrahedra. There are a spread of U–O bond distances ranging from 1.80–2.51 Å. Mo6+ is bonded to four O2- atoms to form MoO4 tetrahedra that share corners with four equivalent UO7 pentagonal bipyramids. There are a spread of Mo–O bond distances ranging from 1.78–1.80 Å. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded in a linear geometry to one U6+ and one Mo6+ atom. In the second O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one U6+ and one Mo6+ atom. In the third O2- site, O2- is bonded in a distorted single-bond geometry to two equivalent U6+ atoms. In the fourth O2- site, O2- is bonded in a single-bond geometry to one U6+ atom. In the fifth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one U6+ and one Mo6+ atom. In the sixth O2- site, O2- is bonded in a distorted linear geometry to one U6+ and one Mo6+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on K2U2MoO10 by Materials Project

K2(UO2)2(MoO4)O2 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. there are two inequivalent K1+ sites. In the first K1+ site, K1+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of K–O bond distances ranging from 2.78–2.95 Å. In the second K1+ site, K1+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of K–O bond distances ranging from 2.75–3.19 Å. There are two inequivalent U6+ sites. In the first U6+ site, U6+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of U–O bond distances ranging from 1.85–2.42 Å. In the second U6+ site, U6+ is bonded to seven O2- atoms to form distorted UO7 pentagonal bipyramids that share corners with two equivalent MoO4 tetrahedra and an edgeedge with one UO7 pentagonal bipyramid. There are a spread of U–O bond distances ranging from 1.84–2.62 Å. Mo6+ is bonded to four O2- atoms to form MoO4 tetrahedra that share corners with two equivalent UO7 pentagonal bipyramids. There are a spread of Mo–O bond distances ranging from 1.77–1.83 Å. There are ten inequivalent O2- sites. In the first O2- site, O2- is bonded in a 1-coordinate geometry to three K1+ and one Mo6+ atom. In the second O2- site, O2- is bonded in a distorted trigonal planar geometry to three U6+ atoms. In the third O2- site, O2- is bonded in a distorted single-bond geometry to one K1+, one U6+, and one Mo6+ atom. In the fourth O2- site, O2- is bonded in a 4-coordinate geometry to one K1+ and three U6+ atoms. In the fifth O2- site, O2- is bonded in a distorted single-bond geometry to two equivalent K1+ and one U6+ atom. In the sixth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one U6+ and one Mo6+ atom. In the seventh O2- site, O2- is bonded in a distorted single-bond geometry to two equivalent K1+ and one U6+ atom. In the eighth O2- site, O2- is bonded in a distorted single-bond geometry to two equivalent K1+ and one U6+ atom. In the ninth O2- site, O2- is bonded in a distorted single-bond geometry to two equivalent K1+ and one U6+ atom. In the tenth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one U6+ and one Mo6+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on U(MoO4)2 by Materials Project

UMo2O8 crystallizes in the orthorhombic Pbca space group. The structure is three-dimensional. U4+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of U–O bond distances ranging from 2.29–2.42 Å. There are two inequivalent Mo6+ sites. In the first Mo6+ site, Mo6+ is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of Mo–O bond distances ranging from 1.79–1.83 Å. In the second Mo6+ site, Mo6+ is bonded in a tetrahedral geometry to four O2- atoms. There is three shorter (1.80 Å) and one longer (1.81 Å) Mo–O bond length. There are eight inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one U4+ and one Mo6+ atom. In the second O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one U4+ and one Mo6+ atom. In the third O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one U4+ and one Mo6+ atom. In the fourth O2- site, O2- is bonded in a distorted linear geometry to one U4+ and one Mo6+ atom. In the fifth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one U4+ and one Mo6+ atom. In the sixth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one U4+ and one Mo6+ atom. In the seventh O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one U4+ and one Mo6+ atom. In the eighth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one U4+ and one Mo6+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on U2MoO8 by Materials Project

U2MoO8 crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are eight inequivalent U5+ sites. In the first U5+ site, U5+ is bonded to seven O2- atoms to form distorted UO7 pentagonal bipyramids that share corners with two UO6 octahedra, corners with two equivalent UO7 pentagonal bipyramids, and an edgeedge with one UO6 octahedra. The corner-sharing octahedra tilt angles range from 29–56°. There are a spread of U–O bond distances ranging from 2.03–2.57 Å. In the second U5+ site, U5+ is bonded to six O2- atoms to form distorted UO6 octahedra that share corners with four UO6 octahedra, corners with two UO7 pentagonal bipyramids, and an edgeedge with one UO7 pentagonal bipyramid. The corner-sharing octahedra tilt angles range from 3–61°. There are a spread of U–O bond distances ranging from 2.07–2.21 Å. In the third U5+ site, U5+ is bonded to six O2- atoms to form distorted UO6 octahedra that share corners with four UO6 octahedra, corners with two UO7 pentagonal bipyramids, and an edgeedge with one UO7 pentagonal bipyramid. The corner-sharing octahedra tilt angles range from 3–61°. There are a spread of U–O bond distances ranging from 2.07–2.21 Å. In the fourth U5+ site, U5+ is bonded to seven O2- atoms to form distorted UO7 pentagonal bipyramids that share corners with two UO6 octahedra, corners with two equivalent UO7 pentagonal bipyramids, and an edgeedge with one UO6 octahedra. The corner-sharing octahedra tilt angles range from 29–56°. There are a spread of U–O bond distances ranging from 2.04–2.57 Å. In the fifth U5+ site, U5+ is bonded to six O2- atoms to form distorted UO6 octahedra that share corners with four UO6 octahedra, corners with two UO7 pentagonal bipyramids, and an edgeedge with one UO7 pentagonal bipyramid. The corner-sharing octahedra tilt angles range from 3–61°. There are a spread of U–O bond distances ranging from 2.07–2.21 Å. In the sixth U5+ site, U5+ is bonded to seven O2- atoms to form distorted UO7 pentagonal bipyramids that share corners with two UO6 octahedra, corners with two equivalent UO7 pentagonal bipyramids, and an edgeedge with one UO6 octahedra. The corner-sharing octahedra tilt angles range from 29–56°. There are a spread of U–O bond distances ranging from 2.03–2.57 Å. In the seventh U5+ site, U5+ is bonded to six O2- atoms to form distorted UO6 octahedra that share corners with four UO6 octahedra, corners with two UO7 pentagonal bipyramids, and an edgeedge with one UO7 pentagonal bipyramid. The corner-sharing octahedra tilt angles range from 3–61°. There are a spread of U–O bond distances ranging from 2.07–2.21 Å. In the eighth U5+ site, U5+ is bonded to seven O2- atoms to form distorted UO7 pentagonal bipyramids that share corners with two UO6 octahedra, corners with two equivalent UO7 pentagonal bipyramids, and an edgeedge with one UO6 octahedra. The corner-sharing octahedra tilt angles range from 29–56°. There are a spread of U–O bond distances ranging from 2.03–2.56 Å. There are four inequivalent Mo6+ sites. In the first Mo6+ site, Mo6+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Mo–O bond distances ranging from 1.75–2.41 Å. In the second Mo6+ site, Mo6+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Mo–O bond distances ranging from 1.74–2.41 Å. In the third Mo6+ site, Mo6+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Mo–O bond distances ranging from 1.75–2.41 Å. In the fourth Mo6+ site, Mo6+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Mo–O bond distances ranging from 1.75–2.41 Å. There are thirty-two inequivalent O2- sites. In the first O2- site, O2- is bonded in a trigonal planar geometry to three U5+ atoms. In the second O2- site, O2- is bonded in a bent 150 degrees geometry to one U5+ and one Mo6+ atom. In the third O2- site, O2- is bonded in a bent 150 degrees geometry to one U5+ and one Mo6+ atom. In the fourth O2- site, O2- is bonded in a distorted single-bond geometry to two equivalent Mo6+ atoms. In the fifth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to two U5+ atoms. In the sixth O2- site, O2- is bonded in a trigonal planar geometry to three U5+ atoms. In the seventh O2- site, O2- is bonded in a trigonal planar geometry to three U5+ atoms. In the eighth O2- site, O2- is bonded in a linear geometry to two equivalent U5+ atoms. In the ninth O2- site, O2- is bonded in a 2-coordinate geometry to two U5+ and one Mo6+ atom. In the tenth O2- site, O2- is bonded in a linear geometry to two equivalent U5+ atoms. In the eleventh O2- site, O2- is bonded in a distorted single-bond geometry to two equivalent Mo6+ atoms. In the twelfth O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to one U5+ and two Mo6+ atoms. In the thirteenth O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to one U5+ and two Mo6+ atoms. In the fourteenth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to two U5+ atoms. In the fifteenth O2- site, O2- is bonded in a linear geometry to two equivalent U5+ atoms. In the sixteenth O2- site, O2- is bonded in a linear geometry to two equivalent U5+ atoms. In the seventeenth O2- site, O2- is bonded in a linear geometry to two equivalent U5+ atoms. In the eighteenth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to two U5+ atoms. In the nineteenth O2- site, O2- is bonded in a 2-coordinate geometry to two U5+ and one Mo6+ atom. In the twentieth O2- site, O2- is bonded in a bent 150 degrees geometry to one U5+ and one Mo6+ atom. In the twenty-first O2- site, O2- is bonded in a linear geometry to two equivalent U5+ atoms. In the twenty-second O2- site, O2- is bonded in a distorted single-bond geometry to two equivalent Mo6+ atoms. In the twenty-third O2- site, O2- is bonded in a trigonal planar geometry to three U5+ atoms. In the twenty-fourth O2- site, O2- is bonded in a linear geometry to two equivalent U5+ atoms. In the twenty-fifth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to two U5+ atoms. In the twenty-sixth O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to one U5+ and two Mo6+ atoms. In the twenty-seventh O2- site, O2- is bonded in a bent 150 degrees geometry to one U5+ and one Mo6+ atom. In the twenty-eighth O2- site, O2- is bonded in a 2-coordinate geometry to two U5+ and one Mo6+ atom. In the twenty-ninth O2- site, O2- is bonded in a distorted single-bond geometry to two equivalent Mo6+ atoms. In the thirtieth O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to one U5+ and two Mo6+ atoms. In the thirty-first O2- site, O2- is bonded in a 2-coordinate geometry to two U5+ and one Mo6+ atom. In the thirty-second O2- site, O2- is bonded in a linear geometry to two equivalent U5+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on UMo2H2O9 by Materials Project

UMo2O9H2 crystallizes in the monoclinic C2/c space group. The structure is two-dimensional and consists of twenty-four dihydrogen molecules and six UMo2O9 sheets oriented in the (1, 0, 0) direction. In each UMo2O9 sheet, U4+ is bonded in a distorted pentagonal bipyramidal geometry to seven O2- atoms. There are a spread of U–O bond distances ranging from 1.79–2.51 Å. There are two inequivalent Mo6+ sites. In the first Mo6+ site, Mo6+ is bonded in a 5-coordinate geometry to five O2- atoms. There are a spread of Mo–O bond distances ranging from 1.70–2.16 Å. In the second Mo6+ site, Mo6+ is bonded in a 5-coordinate geometry to five O2- atoms. There are a spread of Mo–O bond distances ranging from 1.70–2.16 Å. There are nine inequivalent O2- sites. In the first O2- site, O2- is bonded in a 3-coordinate geometry to one U4+ and two Mo6+ atoms. In the second O2- site, O2- is bonded in a single-bond geometry to one Mo6+ atom. In the third O2- site, O2- is bonded in a 3-coordinate geometry to one U4+ and two Mo6+ atoms. In the fourth O2- site, O2- is bonded in a 3-coordinate geometry to one U4+ and two Mo6+ atoms. In the fifth O2- site, O2- is bonded in a single-bond geometry to one Mo6+ atom. In the sixth O2- site, O2- is bonded in a bent 150 degrees geometry to one U4+ and one Mo6+ atom. In the seventh O2- site, O2- is bonded in a single-bond geometry to one U4+ atom. In the eighth O2- site, O2- is bonded in a bent 150 degrees geometry to one U4+ and one Mo6+ atom. In the ninth O2- site, O2- is bonded in a single-bond geometry to one U4+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on U2MoO8 by Materials Project

U2MoO8 crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are eight inequivalent U5+ sites. In the first U5+ site, U5+ is bonded to seven O2- atoms to form distorted UO7 pentagonal bipyramids that share a cornercorner with one UO6 octahedra, corners with three UO7 pentagonal bipyramids, and an edgeedge with one UO6 octahedra. The corner-sharing octahedral tilt angles are 30°. There are a spread of U–O bond distances ranging from 2.03–2.59 Å. In the second U5+ site, U5+ is bonded to six O2- atoms to form distorted UO6 pentagonal bipyramids that share corners with two equivalent UO6 octahedra, corners with four UO6 pentagonal bipyramids, and an edgeedge with one UO7 pentagonal bipyramid. The corner-sharing octahedral tilt angles are 62°. There are a spread of U–O bond distances ranging from 2.07–2.20 Å. In the third U5+ site, U5+ is bonded to six O2- atoms to form distorted UO6 octahedra that share corners with two equivalent UO6 octahedra, corners with four UO7 pentagonal bipyramids, and an edgeedge with one UO7 pentagonal bipyramid. The corner-sharing octahedral tilt angles are 3°. There are a spread of U–O bond distances ranging from 2.07–2.19 Å. In the fourth U5+ site, U5+ is bonded to seven O2- atoms to form distorted UO7 pentagonal bipyramids that share a cornercorner with one UO6 octahedra, corners with three UO7 pentagonal bipyramids, and an edgeedge with one UO6 pentagonal bipyramid. The corner-sharing octahedral tilt angles are 57°. There are a spread of U–O bond distances ranging from 2.03–2.60 Å. In the fifth U5+ site, U5+ is bonded to six O2- atoms to form distorted UO6 pentagonal bipyramids that share corners with two equivalent UO6 octahedra, corners with four UO7 pentagonal bipyramids, and an edgeedge with one UO7 pentagonal bipyramid. The corner-sharing octahedral tilt angles are 62°. There are a spread of U–O bond distances ranging from 2.07–2.19 Å. In the sixth U5+ site, U5+ is bonded to seven O2- atoms to form a mixture of distorted edge and corner-sharing UO7 pentagonal bipyramids. The corner-sharing octahedral tilt angles are 57°. There are a spread of U–O bond distances ranging from 2.03–2.60 Å. In the seventh U5+ site, U5+ is bonded to six O2- atoms to form distorted UO6 octahedra that share corners with two equivalent UO6 octahedra, corners with four UO6 pentagonal bipyramids, and an edgeedge with one UO7 pentagonal bipyramid. The corner-sharing octahedral tilt angles are 3°. There are a spread of U–O bond distances ranging from 2.07–2.19 Å. In the eighth U5+ site, U5+ is bonded to seven O2- atoms to form a mixture of distorted edge and corner-sharing UO7 pentagonal bipyramids. The corner-sharing octahedral tilt angles are 30°. There are a spread of U–O bond distances ranging from 2.03–2.59 Å. There are four inequivalent Mo6+ sites. In the first Mo6+ site, Mo6+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Mo–O bond distances ranging from 1.74–2.41 Å. In the second Mo6+ site, Mo6+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Mo–O bond distances ranging from 1.74–2.41 Å. In the third Mo6+ site, Mo6+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Mo–O bond distances ranging from 1.74–2.41 Å. In the fourth Mo6+ site, Mo6+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Mo–O bond distances ranging from 1.74–2.40 Å. There are thirty-two inequivalent O2- sites. In the first O2- site, O2- is bonded in a trigonal planar geometry to three U5+ atoms. In the second O2- site, O2- is bonded in a bent 150 degrees geometry to one U5+ and one Mo6+ atom. In the third O2- site, O2- is bonded in a bent 150 degrees geometry to one U5+ and one Mo6+ atom. In the fourth O2- site, O2- is bonded in a distorted single-bond geometry to two equivalent Mo6+ atoms. In the fifth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to two U5+ atoms. In the sixth O2- site, O2- is bonded in a trigonal planar geometry to three U5+ atoms. In the seventh O2- site, O2- is bonded in a trigonal planar geometry to three U5+ atoms. In the eighth O2- site, O2- is bonded in a linear geometry to two equivalent U5+ atoms. In the ninth O2- site, O2- is bonded in a 2-coordinate geometry to two U5+ and one Mo6+ atom. In the tenth O2- site, O2- is bonded in a linear geometry to two equivalent U5+ atoms. In the eleventh O2- site, O2- is bonded in a distorted single-bond geometry to two equivalent Mo6+ atoms. In the twelfth O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to one U5+ and two Mo6+ atoms. In the thirteenth O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to one U5+ and two Mo6+ atoms. In the fourteenth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to two U5+ atoms. In the fifteenth O2- site, O2- is bonded in a linear geometry to two equivalent U5+ atoms. In the sixteenth O2- site, O2- is bonded in a linear geometry to two equivalent U5+ atoms. In the seventeenth O2- site, O2- is bonded in a linear geometry to two equivalent U5+ atoms. In the eighteenth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to two U5+ atoms. In the nineteenth O2- site, O2- is bonded in a 2-coordinate geometry to two U5+ and one Mo6+ atom. In the twentieth O2- site, O2- is bonded in a bent 150 degrees geometry to one U5+ and one Mo6+ atom. In the twenty-first O2- site, O2- is bonded in a linear geometry to two equivalent U5+ atoms. In the twenty-second O2- site, O2- is bonded in a distorted single-bond geometry to two equivalent Mo6+ atoms. In the twenty-third O2- site, O2- is bonded in a trigonal planar geometry to three U5+ atoms. In the twenty-fourth O2- site, O2- is bonded in a linear geometry to two equivalent U5+ atoms. In the twenty-fifth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to two U5+ atoms. In the twenty-sixth O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to one U5+ and two Mo6+ atoms. In the twenty-seventh O2- site, O2- is bonded in a bent 150 degrees geometry to one U5+ and one Mo6+ atom. In the twenty-eighth O2- site, O2- is bonded in a 2-coordinate geometry to two U5+ and one Mo6+ atom. In the twenty-ninth O2- site, O2- is bonded in a distorted single-bond geometry to two equivalent Mo6+ atoms. In the thirtieth O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to one U5+ and two Mo6+ atoms. In the thirty-first O2- site, O2- is bonded in a distorted bent 150 degrees geometry to two U5+ and one Mo6+ atom. In the thirty-second O2- site, O2- is bonded in a linear geometry to two equivalent U5+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on UMn(MoO4)4 by Materials Project

UMn(MoO4)4 crystallizes in the triclinic P-1 space group. The structure is three-dimensional. U6+ is bonded to seven O2- atoms to form distorted UO7 pentagonal bipyramids that share corners with two equivalent MnO7 pentagonal bipyramids. There are a spread of U–O bond distances ranging from 1.85–2.37 Å. There are four inequivalent Mo6+ sites. In the first Mo6+ site, Mo6+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Mo–O bond distances ranging from 1.76–2.28 Å. In the second Mo6+ site, Mo6+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Mo–O bond distances ranging from 1.76–2.30 Å. In the third Mo6+ site, Mo6+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Mo–O bond distances ranging from 1.75–2.30 Å. In the fourth Mo6+ site, Mo6+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Mo–O bond distances ranging from 1.75–2.29 Å. Mn2+ is bonded to seven O2- atoms to form MnO7 pentagonal bipyramids that share corners with two equivalent UO7 pentagonal bipyramids. There are a spread of Mn–O bond distances ranging from 2.18–2.38 Å. There are sixteen inequivalent O2- sites. In the first O2- site, O2- is bonded in a 3-coordinate geometry to one U6+ and two Mo6+ atoms. In the second O2- site, O2- is bonded in a distorted linear geometry to two Mo6+ atoms. In the third O2- site, O2- is bonded in a distorted linear geometry to two Mo6+ atoms. In the fourth O2- site, O2- is bonded in a distorted trigonal planar geometry to two Mo6+ and one Mn2+ atom. In the fifth O2- site, O2- is bonded in a linear geometry to one U6+ and one Mn2+ atom. In the sixth O2- site, O2- is bonded in a bent 150 degrees geometry to one Mo6+ and one Mn2+ atom. In the seventh O2- site, O2- is bonded in a 3-coordinate geometry to one U6+ and two Mo6+ atoms. In the eighth O2- site, O2- is bonded in a linear geometry to one U6+ and one Mn2+ atom. In the ninth O2- site, O2- is bonded in a 3-coordinate geometry to two Mo6+ and one Mn2+ atom. In the tenth O2- site, O2- is bonded in a bent 150 degrees geometry to one U6+ and one Mo6+ atom. In the eleventh O2- site, O2- is bonded in a bent 150 degrees geometry to one Mo6+ and one Mn2+ atom. In the twelfth O2- site, O2- is bonded in a distorted linear geometry to two Mo6+ atoms. In the thirteenth O2- site, O2- is bonded in a distorted trigonal planar geometry to one U6+ and two Mo6+ atoms. In the fourteenth O2- site, O2- is bonded in a bent 150 degrees geometry to one U6+ and one Mo6+ atom. In the fifteenth O2- site, O2- is bonded in a distorted linear geometry to two Mo6+ atoms. In the sixteenth O2- site, O2- is bonded in a 3-coordinate geometry to two Mo6+ and one Mn2+ atom.

36 MATERIALS SCIENCE↗