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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on Ba2SrUO6 by Materials Project

Ba2SrUO6 is Orthorhombic Perovskite-derived structured and crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. Ba2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Ba–O bond distances ranging from 2.70–3.23 Å. Sr2+ is bonded to six O2- atoms to form SrO6 octahedra that share corners with six equivalent UO6 octahedra. The corner-sharing octahedra tilt angles range from 26–30°. There are a spread of Sr–O bond distances ranging from 2.50–2.52 Å. U6+ is bonded to six O2- atoms to form UO6 octahedra that share corners with six equivalent SrO6 octahedra. The corner-sharing octahedra tilt angles range from 26–30°. There are two shorter (2.10 Å) and four longer (2.11 Å) U–O bond lengths. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a 4-coordinate geometry to two equivalent Ba2+, one Sr2+, and one U6+ atom. In the second O2- site, O2- is bonded in a 5-coordinate geometry to three equivalent Ba2+, one Sr2+, and one U6+ atom. In the third O2- site, O2- is bonded in a 5-coordinate geometry to three equivalent Ba2+, one Sr2+, and one U6+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on BaSr4U3O14 by Materials Project

BaSr4U3O14 crystallizes in the orthorhombic Cmce space group. The structure is three-dimensional. Ba2+ is bonded in a distorted body-centered cubic geometry to eight O2- atoms. There are four shorter (2.83 Å) and four longer (2.92 Å) Ba–O bond lengths. There are two inequivalent Sr2+ sites. In the first Sr2+ site, Sr2+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Sr–O bond distances ranging from 2.52–2.67 Å. In the second Sr2+ site, Sr2+ is bonded to seven O2- atoms to form distorted SrO7 pentagonal bipyramids that share corners with three UO6 octahedra and edges with three UO6 octahedra. The corner-sharing octahedra tilt angles range from 37–45°. There are a spread of Sr–O bond distances ranging from 2.47–2.68 Å. There are two inequivalent U6+ sites. In the first U6+ site, U6+ is bonded to six O2- atoms to form UO6 octahedra that share corners with four equivalent UO6 octahedra, corners with two equivalent SrO7 pentagonal bipyramids, and edges with two equivalent SrO7 pentagonal bipyramids. The corner-sharing octahedral tilt angles are 44°. There are two shorter (1.96 Å) and four longer (2.16 Å) U–O bond lengths. In the second U6+ site, U6+ is bonded to six O2- atoms to form UO6 octahedra that share corners with two equivalent UO6 octahedra, corners with two equivalent SrO7 pentagonal bipyramids, and edges with two equivalent SrO7 pentagonal bipyramids. The corner-sharing octahedral tilt angles are 44°. There are a spread of U–O bond distances ranging from 2.05–2.21 Å. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a 4-coordinate geometry to one Ba2+, two Sr2+, and one U6+ atom. In the second O2- site, O2- is bonded in a 4-coordinate geometry to two Sr2+ and two U6+ atoms. In the third O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Sr2+ and one U6+ atom. In the fourth O2- site, O2- is bonded in a 4-coordinate geometry to one Ba2+, two Sr2+, and one U6+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ba2SrUO6 by Materials Project

Ba2SrUO6 crystallizes in the trigonal R-3 space group. The structure is three-dimensional. Ba2+ is bonded in a 3-coordinate geometry to nine equivalent O2- atoms. There are a spread of Ba–O bond distances ranging from 2.72–3.27 Å. Sr2+ is bonded to six equivalent O2- atoms to form SrO6 octahedra that share corners with six equivalent UO6 octahedra. The corner-sharing octahedral tilt angles are 25°. All Sr–O bond lengths are 2.48 Å. U6+ is bonded to six equivalent O2- atoms to form UO6 octahedra that share corners with six equivalent SrO6 octahedra. The corner-sharing octahedral tilt angles are 25°. All U–O bond lengths are 2.10 Å. O2- is bonded in a 5-coordinate geometry to three equivalent Ba2+, one Sr2+, and one U6+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ba2SrUO6 by Materials Project

Ba2SrUO6 is (Cubic) Perovskite-derived structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. Ba2+ is bonded to twelve equivalent O2- atoms to form BaO12 cuboctahedra that share corners with twelve equivalent BaO12 cuboctahedra, faces with six equivalent BaO12 cuboctahedra, faces with four equivalent SrO6 octahedra, and faces with four equivalent UO6 octahedra. All Ba–O bond lengths are 3.18 Å. Sr2+ is bonded to six equivalent O2- atoms to form SrO6 octahedra that share corners with six equivalent UO6 octahedra and faces with eight equivalent BaO12 cuboctahedra. The corner-sharing octahedral tilt angles are 0°. All Sr–O bond lengths are 2.41 Å. U6+ is bonded to six equivalent O2- atoms to form UO6 octahedra that share corners with six equivalent SrO6 octahedra and faces with eight equivalent BaO12 cuboctahedra. The corner-sharing octahedral tilt angles are 0°. All U–O bond lengths are 2.09 Å. O2- is bonded in a distorted linear geometry to four equivalent Ba2+, one Sr2+, and one U6+ atom.

36 MATERIALS SCIENCE↗