Search NASA⌕ Search

SEARCH · Search NASA

Results for “Bi-K-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.

8 records
All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on K3BiO3 by Materials Project

K3BiO3 crystallizes in the cubic I-43m space group. The structure is three-dimensional. K1+ is bonded to five equivalent O2- atoms to form a mixture of distorted edge and corner-sharing KO5 square pyramids. There are a spread of K–O bond distances ranging from 2.72–2.91 Å. Bi3+ is bonded in a distorted trigonal non-coplanar geometry to three equivalent O2- atoms. All Bi–O bond lengths are 2.11 Å. O2- is bonded to five equivalent K1+ and one Bi3+ atom to form a mixture of distorted edge and corner-sharing OK5Bi octahedra. The corner-sharing octahedral tilt angles are 20°.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on K4Bi2O5 by Materials Project

K4Bi2O5 crystallizes in the triclinic P-1 space group. The structure is three-dimensional. there are four inequivalent K1+ sites. In the first K1+ site, K1+ is bonded to five O2- atoms to form distorted KO5 trigonal bipyramids that share a cornercorner with one KO6 octahedra, corners with two equivalent KO5 trigonal bipyramids, edges with five KO6 octahedra, and an edgeedge with one KO5 trigonal bipyramid. The corner-sharing octahedral tilt angles are 24°. There are a spread of K–O bond distances ranging from 2.73–3.00 Å. In the second K1+ site, K1+ is bonded to six O2- atoms to form distorted KO6 octahedra that share corners with two equivalent KO6 octahedra, a cornercorner with one KO5 trigonal bipyramid, edges with five KO6 octahedra, and an edgeedge with one KO5 trigonal bipyramid. The corner-sharing octahedral tilt angles are 13°. There are a spread of K–O bond distances ranging from 2.74–2.98 Å. In the third K1+ site, K1+ is bonded in a distorted square co-planar geometry to four O2- atoms. There are a spread of K–O bond distances ranging from 2.68–2.73 Å. In the fourth K1+ site, K1+ is bonded to six O2- atoms to form distorted KO6 octahedra that share corners with two equivalent KO6 octahedra, edges with four KO6 octahedra, and edges with four equivalent KO5 trigonal bipyramids. The corner-sharing octahedral tilt angles are 13°. There are a spread of K–O bond distances ranging from 2.70–3.12 Å. There are two inequivalent Bi3+ sites. In the first Bi3+ site, Bi3+ is bonded in a distorted trigonal non-coplanar geometry to three O2- atoms. There are a spread of Bi–O bond distances ranging from 2.08–2.16 Å. In the second Bi3+ site, Bi3+ is bonded in a rectangular see-saw-like geometry to four O2- atoms. There are a spread of Bi–O bond distances ranging from 2.08–2.46 Å. There are five inequivalent O2- sites. In the first O2- site, O2- is bonded to four K1+ and one Bi3+ atom to form distorted OK4Bi trigonal bipyramids that share corners with three OK4Bi2 octahedra, a cornercorner with one OK3Bi2 trigonal bipyramid, edges with three OK5Bi octahedra, and edges with two OK4Bi trigonal bipyramids. The corner-sharing octahedra tilt angles range from 18–81°. In the second O2- site, O2- is bonded to five K1+ and one Bi3+ atom to form distorted OK5Bi octahedra that share corners with two equivalent OK5Bi octahedra, corners with three OK3Bi2 trigonal bipyramids, edges with four OK5Bi octahedra, and edges with two OK4Bi trigonal bipyramids. The corner-sharing octahedral tilt angles are 13°. In the third O2- site, O2- is bonded in a 6-coordinate geometry to five K1+ and one Bi3+ atom. In the fourth O2- site, O2- is bonded to three K1+ and two equivalent Bi3+ atoms to form distorted OK3Bi2 trigonal bipyramids that share corners with four OK4Bi2 octahedra, a cornercorner with one OK4Bi trigonal bipyramid, edges with two OK5Bi octahedra, and edges with two OK4Bi trigonal bipyramids. The corner-sharing octahedra tilt angles range from 13–79°. In the fifth O2- site, O2- is bonded to four K1+ and two Bi3+ atoms to form distorted OK4Bi2 octahedra that share corners with two equivalent OK4Bi2 octahedra, corners with four OK3Bi2 trigonal bipyramids, edges with five OK5Bi octahedra, and edges with three OK4Bi trigonal bipyramids. The corner-sharing octahedral tilt angles are 13°.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on KBiO3 by Materials Project

KBiO3 crystallizes in the cubic Pn-3 space group. The structure is three-dimensional. there are two inequivalent K1+ sites. In the first K1+ site, K1+ is bonded in a distorted hexagonal planar geometry to six equivalent O2- atoms. All K–O bond lengths are 2.75 Å. In the second K1+ site, K1+ is bonded in a distorted hexagonal planar geometry to six O2- atoms. There are three shorter (2.75 Å) and three longer (3.06 Å) K–O bond lengths. Bi5+ is bonded to six O2- atoms to form a mixture of corner and edge-sharing BiO6 octahedra. The corner-sharing octahedral tilt angles are 54°. There are a spread of Bi–O bond distances ranging from 2.13–2.18 Å. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a 2-coordinate geometry to two equivalent K1+ and two equivalent Bi5+ atoms. In the second O2- site, O2- is bonded to two K1+ and two equivalent Bi5+ atoms to form a mixture of distorted corner and edge-sharing OK2Bi2 tetrahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on K3BiO4 by Materials Project

K3BiO4 crystallizes in the triclinic P-1 space group. The structure is three-dimensional. there are three inequivalent K1+ sites. In the first K1+ site, K1+ is bonded to six O2- atoms to form distorted KO6 pentagonal pyramids that share corners with two equivalent KO5 trigonal bipyramids, corners with two equivalent BiO5 trigonal bipyramids, edges with three equivalent KO6 pentagonal pyramids, edges with two equivalent BiO5 trigonal bipyramids, and edges with three equivalent KO5 trigonal bipyramids. There are a spread of K–O bond distances ranging from 2.79–3.00 Å. In the second K1+ site, K1+ is bonded to five O2- atoms to form KO5 trigonal bipyramids that share corners with two equivalent KO6 pentagonal pyramids, corners with four equivalent BiO5 trigonal bipyramids, edges with three equivalent KO6 pentagonal pyramids, an edgeedge with one KO5 trigonal bipyramid, and an edgeedge with one BiO5 trigonal bipyramid. There are a spread of K–O bond distances ranging from 2.64–2.82 Å. In the third K1+ site, K1+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of K–O bond distances ranging from 2.78–3.22 Å. Bi5+ is bonded to five O2- atoms to form BiO5 trigonal bipyramids that share corners with two equivalent KO6 pentagonal pyramids, corners with four equivalent KO5 trigonal bipyramids, edges with two equivalent KO6 pentagonal pyramids, an edgeedge with one KO5 trigonal bipyramid, and an edgeedge with one BiO5 trigonal bipyramid. There are a spread of Bi–O bond distances ranging from 2.05–2.32 Å. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a 5-coordinate geometry to four K1+ and one Bi5+ atom. In the second O2- site, O2- is bonded to five K1+ and one Bi5+ atom to form a mixture of distorted corner and edge-sharing OK5Bi octahedra. The corner-sharing octahedra tilt angles range from 13–23°. In the third O2- site, O2- is bonded to five K1+ and one Bi5+ atom to form a mixture of distorted corner and edge-sharing OK5Bi octahedra. The corner-sharing octahedra tilt angles range from 13–23°. In the fourth O2- site, O2- is bonded in a 5-coordinate geometry to three K1+ and two equivalent Bi5+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on KBiO2 by Materials Project

KBiO2 crystallizes in the monoclinic C2/c space group. The structure is three-dimensional. K1+ is bonded to six equivalent O2- atoms to form a mixture of distorted edge and corner-sharing KO6 octahedra. The corner-sharing octahedral tilt angles are 23°. There are a spread of K–O bond distances ranging from 2.75–2.96 Å. Bi3+ is bonded in a see-saw-like geometry to four equivalent O2- atoms. There are two shorter (2.13 Å) and two longer (2.37 Å) Bi–O bond lengths. O2- is bonded to three equivalent K1+ and two equivalent Bi3+ atoms to form a mixture of distorted edge and corner-sharing OK3Bi2 trigonal bipyramids.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on KBiO3 by Materials Project

KBiO3 is (Cubic) Perovskite structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. K1+ is bonded to twelve equivalent O2- atoms to form KO12 cuboctahedra that share corners with twelve equivalent KO12 cuboctahedra, faces with six equivalent KO12 cuboctahedra, and faces with eight equivalent BiO6 octahedra. All K–O bond lengths are 3.03 Å. Bi5+ is bonded to six equivalent O2- atoms to form BiO6 octahedra that share corners with six equivalent BiO6 octahedra and faces with eight equivalent KO12 cuboctahedra. The corner-sharing octahedral tilt angles are 0°. All Bi–O bond lengths are 2.14 Å. O2- is bonded to four equivalent K1+ and two equivalent Bi5+ atoms to form a mixture of distorted face, edge, and corner-sharing OK4Bi2 octahedra. The corner-sharing octahedra tilt angles range from 0–60°.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on K8BiO3 by Materials Project

K8BiO3 crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. K is bonded to one Bi and three equivalent O atoms to form a mixture of distorted corner and edge-sharing KBiO3 tetrahedra. The K–Bi bond length is 3.33 Å. All K–O bond lengths are 3.00 Å. Bi is bonded in a body-centered cubic geometry to eight equivalent K atoms. O is bonded in a body-centered cubic geometry to eight equivalent K atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on K2Bi2O5 by Materials Project

K2Bi2O5 crystallizes in the tetragonal P4/mmm space group. The structure is three-dimensional. there are two inequivalent K1+ sites. In the first K1+ site, K1+ is bonded in a body-centered cubic geometry to eight equivalent O2- atoms. All K–O bond lengths are 2.90 Å. In the second K1+ site, K1+ is bonded to twelve O2- atoms to form KO12 cuboctahedra that share corners with four equivalent KO12 cuboctahedra, faces with four equivalent KO12 cuboctahedra, and faces with eight equivalent BiO5 square pyramids. There are four shorter (3.08 Å) and eight longer (3.26 Å) K–O bond lengths. Bi4+ is bonded to five O2- atoms to form BiO5 square pyramids that share corners with five equivalent BiO5 square pyramids and faces with four equivalent KO12 cuboctahedra. There are one shorter (2.11 Å) and four longer (2.20 Å) Bi–O bond lengths. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a 6-coordinate geometry to four K1+ and two equivalent Bi4+ atoms. In the second O2- site, O2- is bonded to four equivalent K1+ and two equivalent Bi4+ atoms to form a mixture of distorted edge and corner-sharing OK4Bi2 octahedra. The corner-sharing octahedral tilt angles are 0°.

36 MATERIALS SCIENCE↗