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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on UCdO4 by Materials Project

UCdO4 crystallizes in the trigonal R-3m space group. The structure is three-dimensional. U6+ is bonded in a body-centered cubic geometry to eight O2- atoms. There are two shorter (2.02 Å) and six longer (2.28 Å) U–O bond lengths. Cd2+ is bonded in a body-centered cubic geometry to eight O2- atoms. There are six shorter (2.44 Å) and two longer (2.52 Å) Cd–O bond lengths. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded to one U6+ and three equivalent Cd2+ atoms to form a mixture of distorted edge and corner-sharing OUCd3 tetrahedra. In the second O2- site, O2- is bonded to three equivalent U6+ and one Cd2+ atom to form a mixture of distorted edge and corner-sharing OU3Cd tetrahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on UCdO4 by Materials Project

UCdO4 is Hydrophilite-derived structured and crystallizes in the orthorhombic Cmmm space group. The structure is three-dimensional. U6+ is bonded to six O2- atoms to form UO6 octahedra that share corners with eight equivalent CdO6 octahedra and edges with two equivalent UO6 octahedra. The corner-sharing octahedra tilt angles range from 49–54°. There are two shorter (1.97 Å) and four longer (2.17 Å) U–O bond lengths. Cd2+ is bonded to six O2- atoms to form CdO6 octahedra that share corners with eight equivalent UO6 octahedra and edges with two equivalent CdO6 octahedra. The corner-sharing octahedra tilt angles range from 49–54°. There are four shorter (2.32 Å) and two longer (2.34 Å) Cd–O bond lengths. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted trigonal planar geometry to one U6+ and two equivalent Cd2+ atoms. In the second O2- site, O2- is bonded in a trigonal planar geometry to two equivalent U6+ and one Cd2+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on UCd3O6 by Materials Project

UCd3O6 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. U6+ is bonded to six O2- atoms to form UO6 octahedra that share corners with six equivalent CdO6 octahedra. The corner-sharing octahedra tilt angles range from 40–46°. There are four shorter (2.07 Å) and two longer (2.18 Å) U–O bond lengths. There are two inequivalent Cd2+ sites. In the first Cd2+ site, Cd2+ is bonded to six O2- atoms to form CdO6 octahedra that share corners with six equivalent UO6 octahedra. The corner-sharing octahedra tilt angles range from 40–46°. There are a spread of Cd–O bond distances ranging from 2.27–2.39 Å. In the second Cd2+ site, Cd2+ is bonded in a 4-coordinate geometry to four O2- atoms. There are a spread of Cd–O bond distances ranging from 2.25–2.30 Å. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded to one U6+ and three Cd2+ atoms to form distorted corner-sharing OUCd3 trigonal pyramids. In the second O2- site, O2- is bonded in a 3-coordinate geometry to one U6+ and two Cd2+ atoms. In the third O2- site, O2- is bonded in a 3-coordinate geometry to one U6+ and two Cd2+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on UCd2O5 by Materials Project

UCd2O5 crystallizes in the monoclinic C2/c space group. The structure is three-dimensional. U6+ is bonded to six O2- atoms to form corner-sharing UO6 octahedra. The corner-sharing octahedral tilt angles are 54°. There are a spread of U–O bond distances ranging from 1.94–2.30 Å. Cd2+ is bonded in a 4-coordinate geometry to four O2- atoms. There are a spread of Cd–O bond distances ranging from 2.20–2.32 Å. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one U6+ and one Cd2+ atom. In the second O2- site, O2- is bonded in a 3-coordinate geometry to one U6+ and two equivalent Cd2+ atoms. In the third O2- site, O2- is bonded to two equivalent U6+ and two equivalent Cd2+ atoms to form corner-sharing OU2Cd2 tetrahedra.

36 MATERIALS SCIENCE↗