Search NASA⌕ Search

SEARCH · Search NASA

Results for “Cu(IO3)2”

Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.

Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.

4 records
All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on Cu(IO3)2 by Materials Project

Cu(IO3)2 crystallizes in the monoclinic P2_1/m space group. The structure is two-dimensional and consists of one Cu(IO3)2 sheet oriented in the (0, 0, 1) direction. Cu2+ is bonded to six O2- atoms to form CuO6 octahedra that share corners with four equivalent IO5 square pyramids and edges with two equivalent CuO6 octahedra. There are a spread of Cu–O bond distances ranging from 1.97–2.41 Å. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a 2-coordinate geometry to one Cu2+ and one I5+ atom. The O–I bond length is 1.88 Å. In the second O2- site, O2- is bonded in a trigonal non-coplanar geometry to two equivalent Cu2+ and one I5+ atom. The O–I bond length is 1.93 Å. In the third O2- site, O2- is bonded in a 3-coordinate geometry to two equivalent Cu2+ and one I5+ atom. The O–I bond length is 1.80 Å. In the fourth O2- site, O2- is bonded in a distorted single-bond geometry to two I5+ atoms. There are one shorter (1.83 Å) and one longer (2.60 Å) O–I bond lengths. There are two inequivalent I5+ sites. In the first I5+ site, I5+ is bonded in a 5-coordinate geometry to three O2- atoms. In the second I5+ site, I5+ is bonded to five O2- atoms to form distorted IO5 square pyramids that share corners with four equivalent CuO6 octahedra. The corner-sharing octahedra tilt angles range from 45–49°.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Cu(IO3)2 by Materials Project

Cu(IO3)2 crystallizes in the monoclinic P2_1 space group. The structure is three-dimensional. Cu2+ is bonded in a distorted octahedral geometry to six O2- atoms. There are a spread of Cu–O bond distances ranging from 1.97–2.51 Å. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded in a 1-coordinate geometry to one Cu2+ and two equivalent I5+ atoms. There are one shorter (1.83 Å) and one longer (2.59 Å) O–I bond lengths. In the second O2- site, O2- is bonded in a bent 120 degrees geometry to one Cu2+ and one I5+ atom. The O–I bond length is 1.86 Å. In the third O2- site, O2- is bonded in a 2-coordinate geometry to one Cu2+ and one I5+ atom. The O–I bond length is 1.88 Å. In the fourth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Cu2+ and one I5+ atom. The O–I bond length is 1.87 Å. In the fifth O2- site, O2- is bonded in a bent 120 degrees geometry to one Cu2+ and one I5+ atom. The O–I bond length is 1.86 Å. In the sixth O2- site, O2- is bonded in a 3-coordinate geometry to one Cu2+ and two equivalent I5+ atoms. There are one shorter (1.83 Å) and one longer (2.73 Å) O–I bond lengths. There are two inequivalent I5+ sites. In the first I5+ site, I5+ is bonded in a 6-coordinate geometry to four O2- atoms. In the second I5+ site, I5+ is bonded in a 4-coordinate geometry to four O2- atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on NaCu(IO3)3 by Materials Project

NaCu(O3I)3 crystallizes in the triclinic P-1 space group. The structure is three-dimensional. Na1+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Na–O bond distances ranging from 2.46–2.89 Å. There are two inequivalent Cu2+ sites. In the first Cu2+ site, Cu2+ is bonded to six O2- atoms to form corner-sharing CuO6 octahedra. The corner-sharing octahedral tilt angles are 65°. There are a spread of Cu–O bond distances ranging from 1.94–2.49 Å. In the second Cu2+ site, Cu2+ is bonded to six O2- atoms to form corner-sharing CuO6 octahedra. The corner-sharing octahedral tilt angles are 65°. There are a spread of Cu–O bond distances ranging from 1.96–2.45 Å. There are nine inequivalent O2- sites. In the first O2- site, O2- is bonded in a 2-coordinate geometry to one Na1+ and two I5+ atoms. There are one shorter (1.85 Å) and one longer (2.62 Å) O–I bond lengths. In the second O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Na1+ and one I5+ atom. The O–I bond length is 1.83 Å. In the third O2- site, O2- is bonded in a distorted single-bond geometry to one I5+ atom. The O–I bond length is 1.81 Å. In the fourth O2- site, O2- is bonded in a 2-coordinate geometry to one Na1+ and two I5+ atoms. There are one shorter (1.83 Å) and one longer (2.72 Å) O–I bond lengths. In the fifth O2- site, O2- is bonded in a distorted trigonal planar geometry to one Na1+, one Cu2+, and one I5+ atom. The O–I bond length is 1.86 Å. In the sixth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Na1+, one Cu2+, and one I5+ atom. The O–I bond length is 1.87 Å. In the seventh O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to one Na1+, one Cu2+, and one I5+ atom. The O–I bond length is 1.87 Å. In the eighth O2- site, O2- is bonded in a 4-coordinate geometry to one Na1+, two Cu2+, and one I5+ atom. The O–I bond length is 1.84 Å. In the ninth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Cu2+ and one I5+ atom. The O–I bond length is 1.87 Å. There are three inequivalent I5+ sites. In the first I5+ site, I5+ is bonded in a 5-coordinate geometry to four O2- atoms. In the second I5+ site, I5+ is bonded in a 6-coordinate geometry to four O2- atoms. In the third I5+ site, I5+ is bonded in a distorted trigonal non-coplanar geometry to three O2- atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Environmental remediation with functional aerogels and xerogels

Several different types of aerogel and/or xerogel scaffolds have been demonstrated as effective sorbents for the capture and immobilization of radionuclides in gaseous form [e.g., iodine gas or I2(g), Xe] as well as ionic form (e.g., Ce4+, Cs+, I–, IO3-, Rb+, Sr2+, 99Tc7+, and U6+). These scaffolds have unique properties, which include high specific surface areas, high pore volumes, varieties of pore sizes, and functionalities that provide methods for binding radionuclides through physisorption, chemisorption, or a combination thereof. This combination of properties and functionalities make these types of materials ideal scaffolds for use as sorbents for capturing radionuclides. The primary base materials that will be discussed in this chapter include Ag0-functionalized silica aerogels, Ag+-impregnated aluminosilicate aerogels, Ag0-functionalized aluminosilicate aerogels, metal-impregnated (non-Ag) aluminosilicate aerogels and xerogels, sulfide-based aerogels, and carbon-based aerogel composites. For the capture of I2(g), the materials reported herein show some of the highest iodine loadings ever reported for inorganic sorbents. For the capture of ionic species, these materials also show promise to be some of the next generations of materials for active radionuclide remediation. This progress report will describe how these materials are fabricated, the general properties of these materials, as well as an overview of how they have been used for different applications in environmental remediation of radionuclides.

aerogel, xerogel, iodine, radionuclide remediation↗