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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on Ce2Dy2O7 by Materials Project

Dy2Ce2O7 crystallizes in the orthorhombic Pmma space group. The structure is three-dimensional. there are two inequivalent Dy3+ sites. In the first Dy3+ site, Dy3+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Dy–O bond distances ranging from 2.19–2.36 Å. In the second Dy3+ site, Dy3+ is bonded to six O2- atoms to form a mixture of distorted edge and corner-sharing DyO6 octahedra. The corner-sharing octahedral tilt angles are 62°. There are two shorter (2.28 Å) and four longer (2.35 Å) Dy–O bond lengths. There are two inequivalent Ce4+ sites. In the first Ce4+ site, Ce4+ is bonded in a body-centered cubic geometry to eight O2- atoms. There are a spread of Ce–O bond distances ranging from 2.30–2.63 Å. In the second Ce4+ site, Ce4+ is bonded in a body-centered cubic geometry to eight O2- atoms. There are a spread of Ce–O bond distances ranging from 2.31–2.43 Å. There are five inequivalent O2- sites. In the first O2- site, O2- is bonded to two equivalent Dy3+ and two equivalent Ce4+ atoms to form OCe2Dy2 tetrahedra that share corners with fourteen OCe2Dy2 tetrahedra and edges with five OCeDy3 tetrahedra. In the second O2- site, O2- is bonded to three Dy3+ and one Ce4+ atom to form a mixture of distorted edge and corner-sharing OCeDy3 tetrahedra. In the third O2- site, O2- is bonded to two equivalent Dy3+ and two equivalent Ce4+ atoms to form OCe2Dy2 tetrahedra that share corners with fourteen OCeDy3 tetrahedra and edges with five OCe4 tetrahedra. In the fourth O2- site, O2- is bonded to four Ce4+ atoms to form a mixture of edge and corner-sharing OCe4 tetrahedra. In the fifth O2- site, O2- is bonded to one Dy3+ and three Ce4+ atoms to form OCe3Dy tetrahedra that share corners with fourteen OCe2Dy2 tetrahedra and edges with six OCeDy3 tetrahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ce9DyO20 by Materials Project

DyCe9O20 is Fluorite-derived structured and crystallizes in the triclinic P-1 space group. The structure is three-dimensional. Dy is bonded in a body-centered cubic geometry to eight O atoms. All Dy–O bond lengths are 2.38 Å. There are five inequivalent Ce sites. In the first Ce site, Ce is bonded in a body-centered cubic geometry to eight O atoms. There are a spread of Ce–O bond distances ranging from 2.34–2.37 Å. In the second Ce site, Ce is bonded in a body-centered cubic geometry to eight O atoms. All Ce–O bond lengths are 2.36 Å. In the third Ce site, Ce is bonded in a body-centered cubic geometry to eight O atoms. There are a spread of Ce–O bond distances ranging from 2.35–2.38 Å. In the fourth Ce site, Ce is bonded in a body-centered cubic geometry to eight O atoms. There are a spread of Ce–O bond distances ranging from 2.34–2.37 Å. In the fifth Ce site, Ce is bonded in a body-centered cubic geometry to eight O atoms. There are a spread of Ce–O bond distances ranging from 2.34–2.37 Å. There are ten inequivalent O sites. In the first O site, O is bonded to four Ce atoms to form OCe4 tetrahedra that share corners with sixteen OCe3Dy tetrahedra and edges with six OCe4 tetrahedra. In the second O site, O is bonded to one Dy and three Ce atoms to form OCe3Dy tetrahedra that share corners with sixteen OCe4 tetrahedra and edges with six OCe3Dy tetrahedra. In the third O site, O is bonded to one Dy and three Ce atoms to form OCe3Dy tetrahedra that share corners with sixteen OCe4 tetrahedra and edges with six OCe3Dy tetrahedra. In the fourth O site, O is bonded to four Ce atoms to form a mixture of corner and edge-sharing OCe4 tetrahedra. In the fifth O site, O is bonded to four Ce atoms to form a mixture of corner and edge-sharing OCe4 tetrahedra. In the sixth O site, O is bonded to four Ce atoms to form OCe4 tetrahedra that share corners with sixteen OCe4 tetrahedra and edges with six OCe3Dy tetrahedra. In the seventh O site, O is bonded to four Ce atoms to form a mixture of corner and edge-sharing OCe4 tetrahedra. In the eighth O site, O is bonded to one Dy and three Ce atoms to form OCe3Dy tetrahedra that share corners with sixteen OCe4 tetrahedra and edges with six OCe3Dy tetrahedra. In the ninth O site, O is bonded to four Ce atoms to form a mixture of corner and edge-sharing OCe4 tetrahedra. In the tenth O site, O is bonded to one Dy and three Ce atoms to form a mixture of corner and edge-sharing OCe3Dy tetrahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ce3Dy2O9 by Materials Project

Dy2Ce3O9 crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are two inequivalent Dy3+ sites. In the first Dy3+ site, Dy3+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Dy–O bond distances ranging from 2.16–2.45 Å. In the second Dy3+ site, Dy3+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Dy–O bond distances ranging from 2.16–2.47 Å. There are three inequivalent Ce4+ sites. In the first Ce4+ site, Ce4+ is bonded in a body-centered cubic geometry to eight O2- atoms. There are a spread of Ce–O bond distances ranging from 2.28–2.49 Å. In the second Ce4+ site, Ce4+ is bonded in a body-centered cubic geometry to eight O2- atoms. There are a spread of Ce–O bond distances ranging from 2.27–2.50 Å. In the third Ce4+ site, Ce4+ is bonded in a body-centered cubic geometry to eight O2- atoms. There are a spread of Ce–O bond distances ranging from 2.30–2.44 Å. There are nine inequivalent O2- sites. In the first O2- site, O2- is bonded to two equivalent Dy3+ and two equivalent Ce4+ atoms to form a mixture of corner and edge-sharing OCe2Dy2 tetrahedra. In the second O2- site, O2- is bonded to four Ce4+ atoms to form a mixture of corner and edge-sharing OCe4 tetrahedra. In the third O2- site, O2- is bonded to four Ce4+ atoms to form OCe4 tetrahedra that share corners with sixteen OCe4 tetrahedra and edges with six OCe2Dy2 tetrahedra. In the fourth O2- site, O2- is bonded to two equivalent Dy3+ and two equivalent Ce4+ atoms to form a mixture of corner and edge-sharing OCe2Dy2 tetrahedra. In the fifth O2- site, O2- is bonded to two equivalent Dy3+ and two equivalent Ce4+ atoms to form a mixture of distorted corner and edge-sharing OCe2Dy2 tetrahedra. In the sixth O2- site, O2- is bonded to four Dy3+ atoms to form a mixture of corner and edge-sharing ODy4 tetrahedra. In the seventh O2- site, O2- is bonded to two equivalent Dy3+ and two equivalent Ce4+ atoms to form distorted OCe2Dy2 tetrahedra that share corners with fourteen ODy4 tetrahedra and edges with five OCe2Dy2 tetrahedra. In the eighth O2- site, O2- is bonded to four Ce4+ atoms to form a mixture of corner and edge-sharing OCe4 tetrahedra. In the ninth O2- site, O2- is bonded to four Ce4+ atoms to form OCe4 tetrahedra that share corners with sixteen OCe4 tetrahedra and edges with six OCe2Dy2 tetrahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ce2Dy2O7 by Materials Project

Dy2Ce2O7 crystallizes in the tetragonal P-4m2 space group. The structure is three-dimensional. Dy3+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Dy–O bond distances ranging from 2.18–2.45 Å. Ce4+ is bonded in a body-centered cubic geometry to eight O2- atoms. There are a spread of Ce–O bond distances ranging from 2.29–2.46 Å. There are five inequivalent O2- sites. In the first O2- site, O2- is bonded to four equivalent Dy3+ atoms to form ODy4 tetrahedra that share corners with sixteen ODy4 tetrahedra and edges with two equivalent OCe2Dy2 tetrahedra. In the second O2- site, O2- is bonded to two equivalent Dy3+ and two equivalent Ce4+ atoms to form OCe2Dy2 tetrahedra that share corners with twelve OCe4 tetrahedra and edges with six ODy4 tetrahedra. In the third O2- site, O2- is bonded to two equivalent Dy3+ and two equivalent Ce4+ atoms to form a mixture of corner and edge-sharing OCe2Dy2 tetrahedra. In the fourth O2- site, O2- is bonded to four equivalent Ce4+ atoms to form OCe4 tetrahedra that share corners with sixteen OCe2Dy2 tetrahedra and edges with six OCe4 tetrahedra. In the fifth O2- site, O2- is bonded to four equivalent Ce4+ atoms to form OCe4 tetrahedra that share corners with sixteen OCe4 tetrahedra and edges with six OCe2Dy2 tetrahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ce4DyO9 by Materials Project

DyCe4O9 crystallizes in the triclinic P1 space group. The structure is three-dimensional. Dy3+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Dy–O bond distances ranging from 2.22–2.32 Å. There are four inequivalent Ce+3.75+ sites. In the first Ce+3.75+ site, Ce+3.75+ is bonded in a body-centered cubic geometry to eight O2- atoms. There are a spread of Ce–O bond distances ranging from 2.32–2.67 Å. In the second Ce+3.75+ site, Ce+3.75+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Ce–O bond distances ranging from 2.25–2.45 Å. In the third Ce+3.75+ site, Ce+3.75+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Ce–O bond distances ranging from 2.27–2.43 Å. In the fourth Ce+3.75+ site, Ce+3.75+ is bonded in a body-centered cubic geometry to eight O2- atoms. There are a spread of Ce–O bond distances ranging from 2.34–2.57 Å. There are nine inequivalent O2- sites. In the first O2- site, O2- is bonded to four Ce+3.75+ atoms to form OCe4 tetrahedra that share corners with fourteen OCe4 tetrahedra, a cornercorner with one OCe3Dy trigonal pyramid, and edges with six OCe4 tetrahedra. In the second O2- site, O2- is bonded to one Dy3+ and three Ce+3.75+ atoms to form a mixture of distorted edge and corner-sharing OCe3Dy tetrahedra. In the third O2- site, O2- is bonded to one Dy3+ and three Ce+3.75+ atoms to form distorted OCe3Dy trigonal pyramids that share corners with fourteen OCe4 tetrahedra, corners with two equivalent OCe3Dy trigonal pyramids, and edges with four OCe4 tetrahedra. In the fourth O2- site, O2- is bonded to four Ce+3.75+ atoms to form OCe4 tetrahedra that share corners with fourteen OCe4 tetrahedra, a cornercorner with one OCe3Dy trigonal pyramid, and edges with six OCe3Dy tetrahedra. In the fifth O2- site, O2- is bonded to one Dy3+ and three Ce+3.75+ atoms to form OCe3Dy tetrahedra that share corners with eleven OCe4 tetrahedra, a cornercorner with one OCe3Dy trigonal pyramid, and edges with six OCe4 tetrahedra. In the sixth O2- site, O2- is bonded to four Ce+3.75+ atoms to form OCe4 tetrahedra that share corners with fifteen OCe4 tetrahedra, edges with four OCe4 tetrahedra, and edges with two equivalent OCe3Dy trigonal pyramids. In the seventh O2- site, O2- is bonded to two equivalent Dy3+ and two Ce+3.75+ atoms to form OCe2Dy2 tetrahedra that share corners with ten OCe4 tetrahedra, corners with four equivalent OCe3Dy trigonal pyramids, and edges with four OCe3Dy tetrahedra. In the eighth O2- site, O2- is bonded to one Dy3+ and three Ce+3.75+ atoms to form OCe3Dy tetrahedra that share corners with ten OCe4 tetrahedra, corners with two equivalent OCe3Dy trigonal pyramids, edges with four OCe2Dy2 tetrahedra, and edges with two equivalent OCe3Dy trigonal pyramids. In the ninth O2- site, O2- is bonded to four Ce+3.75+ atoms to form OCe4 tetrahedra that share corners with eleven OCe3Dy tetrahedra, corners with four equivalent OCe3Dy trigonal pyramids, and edges with six OCe4 tetrahedra.

36 MATERIALS SCIENCE↗