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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.

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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on USeO5 by Materials Project

UO2SeO3 crystallizes in the monoclinic P2_1/m space group. The structure is two-dimensional and consists of one UO2SeO3 sheet oriented in the (0, 0, 1) direction. U6+ is bonded in a distorted linear geometry to six O2- atoms. There are a spread of U–O bond distances ranging from 1.80–2.51 Å. Se4+ is bonded in a distorted T-shaped geometry to three O2- atoms. All Se–O bond lengths are 1.74 Å. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a single-bond geometry to one U6+ atom. In the second O2- site, O2- is bonded in a distorted single-bond geometry to one Se4+ atom. In the third O2- site, O2- is bonded in a 3-coordinate geometry to two equivalent U6+ and one Se4+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on USeO by Materials Project

UOSe is Matlockite structured and crystallizes in the tetragonal P4/nmm space group. The structure is three-dimensional. U4+ is bonded in a 4-coordinate geometry to five equivalent Se2- and four equivalent O2- atoms. There are four shorter (3.03 Å) and one longer (3.16 Å) U–Se bond lengths. All U–O bond lengths are 2.34 Å. Se2- is bonded in a 5-coordinate geometry to five equivalent U4+ atoms. O2- is bonded to four equivalent U4+ atoms to form a mixture of edge and corner-sharing OU4 tetrahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on USeO6 by Materials Project

USeO6 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. U6+ is bonded to seven O2- atoms to form distorted UO7 pentagonal bipyramids that share corners with two equivalent UO7 pentagonal bipyramids and corners with four equivalent SeO4 tetrahedra. There are a spread of U–O bond distances ranging from 1.79–2.46 Å. Se6+ is bonded to four O2- atoms to form SeO4 tetrahedra that share corners with four equivalent UO7 pentagonal bipyramids. There are a spread of Se–O bond distances ranging from 1.66–1.68 Å. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted single-bond geometry to two equivalent U6+ atoms. In the second O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one U6+ and one Se6+ atom. In the third O2- site, O2- is bonded in a single-bond geometry to one U6+ atom. In the fourth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one U6+ and one Se6+ atom. In the fifth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one U6+ and one Se6+ atom. In the sixth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one U6+ and one Se6+ atom.

36 MATERIALS SCIENCE↗