Search NASA⌕ Search

SEARCH · Search NASA

Results for “Bi-O-Te”

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.

Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.

3 records
All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on Bi2TeO5 by Materials Project

Bi2TeO5 crystallizes in the orthorhombic Aem2 space group. The structure is two-dimensional and consists of one Bi2TeO5 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 2.21–2.79 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 2.09–2.46 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 2.23–3.07 Å. Te4+ is bonded in a 3-coordinate geometry to three O2- atoms. There are a spread of Te–O bond distances ranging from 1.89–1.92 Å. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted bent 150 degrees geometry to four Bi3+ atoms. In the second O2- site, O2- is bonded in a 2-coordinate geometry to one Bi3+ and one Te4+ atom. In the third O2- site, O2- is bonded in a 1-coordinate geometry to two equivalent Bi3+ and one Te4+ atom. In the fourth O2- site, O2- is bonded to four equivalent Bi3+ atoms to form a mixture of distorted edge and corner-sharing OBi4 tetrahedra. In the fifth O2- site, O2- is bonded in a 1-coordinate geometry to three Bi3+ and one Te4+ atom. In the sixth O2- site, O2- is bonded to four Bi3+ atoms to form a mixture of distorted edge and corner-sharing OBi4 tetrahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Bi2TeO6 by Materials Project

Bi2TeO6 crystallizes in the orthorhombic Cmce space group. The structure is three-dimensional. Bi3+ is bonded in a 5-coordinate geometry to five O2- atoms. There are a spread of Bi–O bond distances ranging from 2.28–2.46 Å. Te6+ is bonded to six O2- atoms to form corner-sharing TeO6 octahedra. The corner-sharing octahedral tilt angles are 31°. There is two shorter (1.90 Å) and four longer (2.00 Å) Te–O bond length. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a 1-coordinate geometry to one Bi3+ and one Te6+ atom. In the second O2- site, O2- is bonded in a bent 150 degrees geometry to two equivalent Te6+ atoms. 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 Bi2Te4O11 by Materials Project

Bi2Te4O11 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. there are two inequivalent Bi3+ sites. In the first 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 2.27–2.95 Å. In the second 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 2.25–2.77 Å. There are four inequivalent Te4+ sites. In the first Te4+ site, Te4+ is bonded in a 4-coordinate geometry to four O2- atoms. There are a spread of Te–O bond distances ranging from 1.90–2.37 Å. In the second Te4+ site, Te4+ is bonded in a 4-coordinate geometry to five O2- atoms. There are a spread of Te–O bond distances ranging from 1.89–2.93 Å. In the third Te4+ site, Te4+ is bonded in a 4-coordinate geometry to four O2- atoms. There are a spread of Te–O bond distances ranging from 1.90–2.47 Å. In the fourth Te4+ site, Te4+ is bonded in a 3-coordinate geometry to four O2- atoms. There are a spread of Te–O bond distances ranging from 1.90–2.73 Å. There are eleven inequivalent O2- sites. In the first O2- site, O2- is bonded in a 3-coordinate geometry to two equivalent Bi3+ and one Te4+ atom. In the second O2- site, O2- is bonded in a 1-coordinate geometry to one Bi3+ and two Te4+ atoms. In the third O2- site, O2- is bonded in a 2-coordinate geometry to one Bi3+ and two Te4+ atoms. In the fourth O2- site, O2- is bonded in a 3-coordinate geometry to two equivalent Bi3+ and one Te4+ atom. In the fifth O2- site, O2- is bonded in a bent 150 degrees geometry to two Te4+ atoms. In the sixth O2- site, O2- is bonded in a 1-coordinate geometry to two Bi3+ and one Te4+ atom. In the seventh O2- site, O2- is bonded in a 1-coordinate geometry to two Bi3+ and one Te4+ atom. In the eighth O2- site, O2- is bonded in a 3-coordinate geometry to two Bi3+ and one Te4+ atom. In the ninth O2- site, O2- is bonded in a 1-coordinate geometry to two Bi3+ and one Te4+ atom. In the tenth O2- site, O2- is bonded in a distorted trigonal planar geometry to one Bi3+ and two Te4+ atoms. In the eleventh O2- site, O2- is bonded in a 1-coordinate geometry to three Te4+ atoms.

36 MATERIALS SCIENCE↗