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At least 19 records
All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on CeSe2 by Materials Project

CeSe2 is Molybdenite-like structured and crystallizes in the trigonal R3m space group. The structure is two-dimensional and consists of three CeSe2 sheets oriented in the (0, 0, 1) direction. Ce4+ is bonded to six Se2- atoms to form distorted edge-sharing CeSe6 pentagonal pyramids. There are three shorter (2.89 Å) and three longer (2.90 Å) Ce–Se bond lengths. There are two inequivalent Se2- sites. In the first Se2- site, Se2- is bonded in a distorted T-shaped geometry to three equivalent Ce4+ atoms. In the second Se2- site, Se2- is bonded in a distorted T-shaped geometry to three equivalent Ce4+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on CeSe2 by Materials Project

CeSe2 is trigonal omega-like structured and crystallizes in the hexagonal P6_3/mmc space group. The structure is two-dimensional and consists of four CeSe2 sheets oriented in the (0, 0, 1) direction. Ce4+ is bonded to six equivalent Se2- atoms to form edge-sharing CeSe6 octahedra. All Ce–Se bond lengths are 2.85 Å. Se2- is bonded in a 3-coordinate geometry to three equivalent Ce4+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on CeSe2 by Materials Project

CeSe2 is Molybdenite-like structured and crystallizes in the orthorhombic Fmm2 space group. The structure is two-dimensional and consists of two CeSe2 sheets oriented in the (0, 0, 1) direction. Ce4+ is bonded to six equivalent Se2- atoms to form distorted edge-sharing CeSe6 pentagonal pyramids. All Ce–Se bond lengths are 2.90 Å. Se2- is bonded in a distorted T-shaped geometry to three equivalent Ce4+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on CeSe2 by Materials Project

CeSe2 crystallizes in the orthorhombic Ibam space group. The structure is one-dimensional and consists of two CeSe2 ribbons oriented in the (0, 1, 0) direction. Ce4+ is bonded in a 4-coordinate geometry to four equivalent Se2- atoms. All Ce–Se bond lengths are 2.74 Å. Se2- is bonded in an L-shaped geometry to two equivalent Ce4+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on CeSe2 by Materials Project

CeSe2 is Molybdenite-like structured and crystallizes in the hexagonal P6_3/mmc space group. The structure is two-dimensional and consists of two CeSe2 sheets oriented in the (0, 0, 1) direction. Ce4+ is bonded to six equivalent Se2- atoms to form distorted edge-sharing CeSe6 pentagonal pyramids. All Ce–Se bond lengths are 2.91 Å. Se2- is bonded in a distorted T-shaped geometry to three equivalent Ce4+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on CeSe2 by Materials Project

CeSe2 is Molybdenite-like structured and crystallizes in the hexagonal P-6m2 space group. The structure is two-dimensional and consists of one CeSe2 sheet oriented in the (0, 0, 1) direction. Ce4+ is bonded to six equivalent Se2- atoms to form distorted edge-sharing CeSe6 pentagonal pyramids. All Ce–Se bond lengths are 2.89 Å. Se2- is bonded in a distorted T-shaped geometry to three equivalent Ce4+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on CeSe2 by Materials Project

CeSe2 is trigonal omega-like structured and crystallizes in the monoclinic C2/m space group. The structure is two-dimensional and consists of one CeSe2 sheet oriented in the (0, 0, 1) direction. Ce4+ is bonded to six Se2- atoms to form edge-sharing CeSe6 octahedra. There are one shorter (2.86 Å) and five longer (2.87 Å) Ce–Se bond lengths. There are two inequivalent Se2- sites. In the first Se2- site, Se2- is bonded in a distorted T-shaped geometry to three equivalent Ce4+ atoms. In the second Se2- site, Se2- is bonded in a distorted T-shaped geometry to three equivalent Ce4+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on CeSe2 by Materials Project

CeSe2 is trigonal omega-like structured and crystallizes in the hexagonal P-6m2 space group. The structure is two-dimensional and consists of four CeSe2 sheets oriented in the (0, 0, 1) direction. Ce4+ is bonded in a 6-coordinate geometry to six equivalent Se2- atoms. All Ce–Se bond lengths are 2.92 Å. Se2- is bonded in a distorted T-shaped geometry to three equivalent Ce4+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on CeSe2 by Materials Project

CeSe2 is trigonal omega-like structured and crystallizes in the trigonal R-3m space group. The structure is two-dimensional and consists of three CeSe2 sheets oriented in the (0, 0, 1) direction. Ce4+ is bonded to six equivalent Se2- atoms to form edge-sharing CeSe6 octahedra. All Ce–Se bond lengths are 2.87 Å. Se2- is bonded in a 3-coordinate geometry to three equivalent Ce4+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on CeSe2 by Materials Project

CeSe2 is Cyanogen Chloride-derived structured and crystallizes in the orthorhombic Ibam space group. The structure is zero-dimensional and consists of four CeSe2 clusters. Ce4+ is bonded in a linear geometry to two equivalent Se2- atoms. Both Ce–Se bond lengths are 2.53 Å. Se2- is bonded in a single-bond geometry to one Ce4+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on CeSe2 by Materials Project

CeSe2 is trigonal omega-like structured and crystallizes in the hexagonal P6_3/mmc space group. The structure is two-dimensional and consists of two CeSe2 sheets oriented in the (0, 0, 1) direction. Ce4+ is bonded to six equivalent Se2- atoms to form edge-sharing CeSe6 octahedra. All Ce–Se bond lengths are 2.87 Å. Se2- is bonded in a distorted T-shaped geometry to three equivalent Ce4+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on CeSe2 by Materials Project

CeSe2 is Molybdenite-like structured and crystallizes in the monoclinic C2 space group. The structure is two-dimensional and consists of one CeSe2 sheet oriented in the (0, 0, 1) direction. Ce4+ is bonded to six equivalent Se2- atoms to form distorted edge-sharing CeSe6 pentagonal pyramids. All Ce–Se bond lengths are 2.90 Å. Se2- is bonded in a distorted T-shaped geometry to three equivalent Ce4+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on CeSe2 by Materials Project

CeSe2 is Molybdenite-like structured and crystallizes in the hexagonal P-6m2 space group. The structure is two-dimensional and consists of four CeSe2 sheets oriented in the (0, 0, 1) direction. Ce4+ is bonded to six equivalent Se2- atoms to form distorted edge-sharing CeSe6 pentagonal pyramids. All Ce–Se bond lengths are 2.91 Å. Se2- is bonded in a distorted T-shaped geometry to three equivalent Ce4+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on CeSe2 by Materials Project

CeSe2 is trigonal omega-like structured and crystallizes in the trigonal R-3m space group. The structure is two-dimensional and consists of six CeSe2 sheets oriented in the (0, 0, 1) direction. Ce4+ is bonded to six equivalent Se2- atoms to form edge-sharing CeSe6 octahedra. All Ce–Se bond lengths are 2.87 Å. Se2- is bonded in a 3-coordinate geometry to three equivalent Ce4+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on CeSe2 by Materials Project

CeSe2 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. Ce4+ is bonded in a 9-coordinate geometry to nine Se2- atoms. There are a spread of Ce–Se bond distances ranging from 3.05–3.10 Å. There are two inequivalent Se2- sites. In the first Se2- site, Se2- is bonded to five equivalent Ce4+ atoms to form a mixture of distorted edge and corner-sharing SeCe5 trigonal bipyramids. In the second Se2- site, Se2- is bonded in a 4-coordinate geometry to four equivalent Ce4+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Sr(CeSe2)2 by Materials Project

Sr(CeSe2)2 crystallizes in the tetragonal I-42d space group. The structure is three-dimensional. Sr2+ is bonded to eight equivalent Se2- atoms to form distorted SrSe8 hexagonal bipyramids that share corners with eight equivalent CeSe8 hexagonal bipyramids, edges with four equivalent SrSe8 hexagonal bipyramids, and faces with eight equivalent CeSe8 hexagonal bipyramids. There are four shorter (3.10 Å) and four longer (3.27 Å) Sr–Se bond lengths. Ce3+ is bonded to eight equivalent Se2- atoms to form distorted CeSe8 hexagonal bipyramids that share corners with four equivalent SrSe8 hexagonal bipyramids, corners with four equivalent CeSe8 hexagonal bipyramids, edges with four equivalent CeSe8 hexagonal bipyramids, faces with four equivalent SrSe8 hexagonal bipyramids, and faces with four equivalent CeSe8 hexagonal bipyramids. There are a spread of Ce–Se bond distances ranging from 3.00–3.23 Å. Se2- is bonded to two equivalent Sr2+ and four equivalent Ce3+ atoms to form a mixture of distorted face, edge, and corner-sharing SeSr2Ce4 octahedra. The corner-sharing octahedra tilt angles range from 16–51°.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on CeSe2 by Materials Project

CeSe2 is Titanium Disilicide-like structured and crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. Ce4+ is bonded in a distorted q6 geometry to ten equivalent Se2- atoms. There are eight shorter (3.08 Å) and two longer (3.27 Å) Ce–Se bond lengths. Se2- is bonded in a 10-coordinate geometry to five equivalent Ce4+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on CeSe2 by Materials Project

CeSe2 crystallizes in the hexagonal P6/mmm space group. The structure is three-dimensional. Ce4+ is bonded to twelve equivalent Se2- atoms to form a mixture of edge and face-sharing CeSe12 cuboctahedra. All Ce–Se bond lengths are 3.30 Å. Se2- is bonded in a 9-coordinate geometry to six equivalent Ce4+ and three equivalent Se2- atoms. All Se–Se bond lengths are 2.77 Å.

36 MATERIALS SCIENCE↗