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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on Bi2SeO5 by Materials Project

Bi2SeO5 crystallizes in the orthorhombic Aem2 space group. The structure is two-dimensional and consists of one Bi2SeO5 sheet oriented in the (0, 0, 1) direction. there are three inequivalent Bi3+ sites. In the first Bi3+ site, Bi3+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Bi–O bond distances ranging from 2.22–2.90 Å. In the second Bi3+ site, Bi3+ is bonded in a distorted square pyramidal geometry to five O2- atoms. There are a spread of Bi–O bond distances ranging from 2.09–2.42 Å. In the third Bi3+ site, Bi3+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Bi–O bond distances ranging from 2.26–2.99 Å. Se4+ is bonded in a trigonal non-coplanar geometry to three O2- atoms. There are a spread of Se–O bond distances ranging from 1.72–1.76 Å. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded in a 2-coordinate geometry to four Bi3+ atoms. In the second O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Bi3+ and one Se4+ atom. In the third O2- site, O2- is bonded in a 1-coordinate geometry to two equivalent Bi3+ and one Se4+ atom. In the fourth O2- site, O2- is bonded to four equivalent Bi3+ atoms to form a mixture of corner and edge-sharing OBi4 tetrahedra. In the fifth O2- site, O2- is bonded in a 1-coordinate geometry to three Bi3+ and one Se4+ atom. In the sixth O2- site, O2- is bonded to four Bi3+ atoms to form a mixture of distorted corner and edge-sharing OBi4 tetrahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Bi2SeO2 by Materials Project

Bi2O2Se crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. Bi3+ is bonded in a 4-coordinate geometry to four equivalent Se2- and four equivalent O2- atoms. All Bi–Se bond lengths are 3.32 Å. All Bi–O bond lengths are 2.34 Å. Se2- is bonded in a distorted body-centered cubic geometry to eight equivalent Bi3+ atoms. O2- is bonded to four equivalent Bi3+ atoms to form a mixture of corner and edge-sharing OBi4 tetrahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Bi2SeO2 by Materials Project

Bi2O2Se crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. Bi3+ is bonded in a 5-coordinate geometry to one Se2- and four equivalent O2- atoms. The Bi–Se bond length is 3.30 Å. All Bi–O bond lengths are 2.90 Å. Se2- is bonded in a square co-planar geometry to two equivalent Bi3+ and four equivalent O2- atoms. All Se–O bond lengths are 2.08 Å. O2- is bonded to four equivalent Bi3+ and two equivalent Se2- atoms to form a mixture of distorted corner, edge, and face-sharing OBi4Se2 octahedra. The corner-sharing octahedral tilt angles are 0°.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Bi2SeO6 by Materials Project

Bi2SeO6 crystallizes in the orthorhombic Cmce space group. The structure is three-dimensional. Bi3+ is bonded in a 5-coordinate geometry to nine O2- atoms. There are a spread of Bi–O bond distances ranging from 2.31–2.89 Å. Se6+ is bonded to six O2- atoms to form corner-sharing SeO6 octahedra. The corner-sharing octahedral tilt angles are 31°. There is two shorter (1.75 Å) and four longer (1.97 Å) Se–O bond length. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted bent 150 degrees geometry to two equivalent Bi3+ and two equivalent Se6+ atoms. In the second O2- site, O2- is bonded in a distorted single-bond geometry to three equivalent Bi3+ and one Se6+ atom. In the third O2- site, O2- is bonded to four equivalent Bi3+ atoms to form a mixture of edge and corner-sharing OBi4 tetrahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Bi2Se3O10 by Materials Project

Bi2Se3O10 crystallizes in the monoclinic C2/c space group. The structure is three-dimensional. Bi5+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Bi–O bond distances ranging from 2.25–2.89 Å. There are two inequivalent Se+3.33+ sites. In the first Se+3.33+ site, Se+3.33+ is bonded in a trigonal non-coplanar geometry to three O2- atoms. There are a spread of Se–O bond distances ranging from 1.72–1.79 Å. In the second Se+3.33+ site, Se+3.33+ is bonded in a tetrahedral geometry to four O2- atoms. All Se–O bond lengths are 1.68 Å. There are five inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Bi5+ and one Se+3.33+ atom. In the second O2- site, O2- is bonded in a 2-coordinate geometry to two equivalent Bi5+ and one Se+3.33+ atom. In the third O2- site, O2- is bonded in a distorted water-like geometry to one Bi5+ and one Se+3.33+ atom. In the fourth O2- site, O2- is bonded in a 1-coordinate geometry to two equivalent Bi5+ and one Se+3.33+ atom. In the fifth O2- site, O2- is bonded in a bent 120 degrees geometry to one Bi5+ and one Se+3.33+ atom.

36 MATERIALS SCIENCE↗