Engineering Papers⌕ Search

SEARCH · Engineering Papers

Results for “Ba-Bi-Ir-O”

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.

Materials Data on Ba4Bi(IrO4)3 by Materials Project

Ba4Bi(IrO4)3 is Orthorhombic Perovskite-derived structured and crystallizes in the monoclinic C2/m space group. The structure is three-dimensional. there are six inequivalent Ba2+ sites. In the first Ba2+ site, Ba2+ is bonded in a 11-coordinate geometry to eleven O2- atoms. There are a spread of Ba–O bond distances ranging from 2.75–3.26 Å. In the second Ba2+ site, Ba2+ is bonded in a 12-coordinate geometry to twelve O2- atoms. There are a spread of Ba–O bond distances ranging from 2.81–3.46 Å. In the third Ba2+ site, Ba2+ is bonded in a 12-coordinate geometry to ten O2- atoms. There are a spread of Ba–O bond distances ranging from 2.80–3.21 Å. In the fourth Ba2+ site, Ba2+ is bonded in a 11-coordinate geometry to eleven O2- atoms. There are a spread of Ba–O bond distances ranging from 2.73–3.15 Å. In the fifth Ba2+ site, Ba2+ is bonded in a 11-coordinate geometry to eleven O2- atoms. There are a spread of Ba–O bond distances ranging from 2.73–3.19 Å. In the sixth Ba2+ site, Ba2+ is bonded in a 10-coordinate geometry to ten O2- atoms. There are a spread of Ba–O bond distances ranging from 2.79–3.20 Å. There are five inequivalent Ir+4.33+ sites. In the first Ir+4.33+ site, Ir+4.33+ is bonded to six O2- atoms to form face-sharing IrO6 octahedra. There are two shorter (2.03 Å) and four longer (2.05 Å) Ir–O bond lengths. In the second Ir+4.33+ site, Ir+4.33+ is bonded to six O2- atoms to form IrO6 octahedra that share corners with three equivalent BiO6 octahedra and a faceface with one IrO6 octahedra. The corner-sharing octahedra tilt angles range from 17–23°. There are a spread of Ir–O bond distances ranging from 1.98–2.08 Å. In the third Ir+4.33+ site, Ir+4.33+ is bonded to six O2- atoms to form IrO6 octahedra that share corners with three equivalent BiO6 octahedra and a faceface with one IrO6 octahedra. The corner-sharing octahedra tilt angles range from 18–22°. There are a spread of Ir–O bond distances ranging from 1.98–2.08 Å. In the fourth Ir+4.33+ site, Ir+4.33+ is bonded to six O2- atoms to form face-sharing IrO6 octahedra. There are a spread of Ir–O bond distances ranging from 2.03–2.05 Å. In the fifth Ir+4.33+ site, Ir+4.33+ is bonded to six O2- atoms to form IrO6 octahedra that share corners with three equivalent BiO6 octahedra and a faceface with one IrO6 octahedra. The corner-sharing octahedra tilt angles range from 19–22°. There are a spread of Ir–O bond distances ranging from 1.98–2.08 Å. There are two inequivalent Bi3+ sites. In the first Bi3+ site, Bi3+ is bonded to six O2- atoms to form BiO6 octahedra that share corners with six IrO6 octahedra. The corner-sharing octahedra tilt angles range from 17–23°. There are a spread of Bi–O bond distances ranging from 2.29–2.33 Å. In the second Bi3+ site, Bi3+ is bonded to six O2- atoms to form BiO6 octahedra that share corners with six equivalent IrO6 octahedra. The corner-sharing octahedra tilt angles range from 19–22°. There are four shorter (2.29 Å) and two longer (2.35 Å) Bi–O bond lengths. There are twelve inequivalent O2- sites. In the first O2- site, O2- is bonded in a 5-coordinate geometry to four Ba2+ and two Ir+4.33+ atoms. In the second O2- site, O2- is bonded in a 5-coordinate geometry to three Ba2+, one Ir+4.33+, and one Bi3+ atom. In the third O2- site, O2- is bonded in a 5-coordinate geometry to three Ba2+, one Ir+4.33+, and one Bi3+ atom. In the fourth O2- site, O2- is bonded in a 6-coordinate geometry to four Ba2+ and two Ir+4.33+ atoms. In the fifth O2- site, O2- is bonded in a 6-coordinate geometry to four Ba2+ and two Ir+4.33+ atoms. In the sixth O2- site, O2- is bonded in a 5-coordinate geometry to three equivalent Ba2+, one Ir+4.33+, and one Bi3+ atom. In the seventh O2- site, O2- is bonded in a 6-coordinate geometry to four Ba2+ and two Ir+4.33+ atoms. In the eighth O2- site, O2- is bonded in a 5-coordinate geometry to three Ba2+, one Ir+4.33+, and one Bi3+ atom. In the ninth O2- site, O2- is bonded in a 5-coordinate geometry to four Ba2+, one Ir+4.33+, and one Bi3+ atom. In the tenth O2- site, O2- is bonded in a 6-coordinate geometry to four Ba2+ and two Ir+4.33+ atoms. In the eleventh O2- site, O2- is bonded in a 6-coordinate geometry to four Ba2+ and two Ir+4.33+ atoms. In the twelfth O2- site, O2- is bonded in a 5-coordinate geometry to three Ba2+, one Ir+4.33+, and one Bi3+ atom.

36 MATERIALS SCIENCE↗

Materials Data on Ba3BiIr2O9 by Materials Project

Ba3BiIr2O9 is Orthorhombic Perovskite-derived structured and crystallizes in the monoclinic C2/c space group. The structure is three-dimensional. there are two inequivalent Ba2+ sites. In the first Ba2+ site, Ba2+ is bonded in a 10-coordinate geometry to ten O2- atoms. There are a spread of Ba–O bond distances ranging from 2.76–3.02 Å. In the second Ba2+ site, Ba2+ is bonded in a 12-coordinate geometry to eleven O2- atoms. There are a spread of Ba–O bond distances ranging from 2.80–3.24 Å. Ir+4.50+ is bonded to six O2- atoms to form IrO6 octahedra that share corners with three equivalent BiO6 octahedra and a faceface with one IrO6 octahedra. The corner-sharing octahedra tilt angles range from 9–17°. There are a spread of Ir–O bond distances ranging from 1.99–2.08 Å. Bi3+ is bonded to six O2- atoms to form BiO6 octahedra that share corners with six equivalent IrO6 octahedra. The corner-sharing octahedra tilt angles range from 9–17°. There are a spread of Bi–O bond distances ranging from 2.29–2.32 Å. There are five inequivalent O2- sites. In the first O2- site, O2- is bonded in a 5-coordinate geometry to three Ba2+, one Ir+4.50+, and one Bi3+ atom. In the second O2- site, O2- is bonded in a 5-coordinate geometry to three equivalent Ba2+, one Ir+4.50+, and one Bi3+ atom. In the third O2- site, O2- is bonded in a 6-coordinate geometry to four Ba2+ and two equivalent Ir+4.50+ atoms. In the fourth O2- site, O2- is bonded in a 2-coordinate geometry to four Ba2+, one Ir+4.50+, and one Bi3+ atom. In the fifth O2- site, O2- is bonded in a 6-coordinate geometry to four Ba2+ and two equivalent Ir+4.50+ atoms.

36 MATERIALS SCIENCE↗

Materials Data on Ba2BiIrO6 by Materials Project

Ba2BiIrO6 is Orthorhombic Perovskite-derived structured and crystallizes in the triclinic P-1 space group. The structure is three-dimensional. Ba2+ is bonded in a 12-coordinate geometry to twelve O2- atoms. There are a spread of Ba–O bond distances ranging from 2.77–3.36 Å. Ir5+ is bonded to six O2- atoms to form IrO6 octahedra that share corners with six equivalent BiO6 octahedra. The corner-sharing octahedra tilt angles range from 11–17°. There are two shorter (2.00 Å) and four longer (2.01 Å) Ir–O bond lengths. Bi3+ is bonded to six O2- atoms to form BiO6 octahedra that share corners with six equivalent IrO6 octahedra. The corner-sharing octahedra tilt angles range from 11–17°. There are two shorter (2.32 Å) and four longer (2.33 Å) Bi–O bond lengths. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a 6-coordinate geometry to four equivalent Ba2+, one Ir5+, and one Bi3+ atom. In the second O2- site, O2- is bonded in a 4-coordinate geometry to four equivalent Ba2+, one Ir5+, and one Bi3+ atom. In the third O2- site, O2- is bonded in a 5-coordinate geometry to four equivalent Ba2+, one Ir5+, and one Bi3+ atom.

36 MATERIALS SCIENCE↗

Materials Data on Ba2BiIrO6 by Materials Project

Ba2BiIrO6 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 IrO6 octahedra, and faces with four equivalent BiO6 octahedra. All Ba–O bond lengths are 3.04 Å. Ir5+ is bonded to six equivalent O2- atoms to form IrO6 octahedra that share corners with six equivalent BiO6 octahedra and faces with eight equivalent BaO12 cuboctahedra. The corner-sharing octahedral tilt angles are 0°. All Ir–O bond lengths are 1.99 Å. Bi3+ is bonded to six equivalent O2- atoms to form BiO6 octahedra that share corners with six equivalent IrO6 octahedra and faces with eight equivalent BaO12 cuboctahedra. The corner-sharing octahedral tilt angles are 0°. All Bi–O bond lengths are 2.30 Å. O2- is bonded in a distorted linear geometry to four equivalent Ba2+, one Ir5+, and one Bi3+ atom.

36 MATERIALS SCIENCE↗