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9 records
All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on K3Cu2F7 by Materials Project

K3Cu2F7 crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. there are two inequivalent K1+ sites. In the first K1+ site, K1+ is bonded in a 9-coordinate geometry to nine F1- atoms. There are a spread of K–F bond distances ranging from 2.66–2.90 Å. In the second K1+ site, K1+ is bonded to twelve F1- atoms to form KF12 cuboctahedra that share corners with four equivalent KF12 cuboctahedra, faces with four equivalent KF12 cuboctahedra, and faces with eight equivalent CuF6 octahedra. There are eight shorter (2.87 Å) and four longer (2.89 Å) K–F bond lengths. Cu2+ is bonded to six F1- atoms to form CuF6 octahedra that share corners with five equivalent CuF6 octahedra and faces with four equivalent KF12 cuboctahedra. The corner-sharing octahedra tilt angles range from 0–2°. There are a spread of Cu–F bond distances ranging from 2.03–2.05 Å. There are three inequivalent F1- sites. In the first F1- site, F1- is bonded to four K1+ and two equivalent Cu2+ atoms to form a mixture of distorted face, edge, and corner-sharing FK4Cu2 octahedra. The corner-sharing octahedra tilt angles range from 0–61°. In the second F1- site, F1- is bonded in a distorted linear geometry to four equivalent K1+ and two equivalent Cu2+ atoms. In the third F1- site, F1- is bonded to five equivalent K1+ and one Cu2+ atom to form distorted FK5Cu octahedra that share corners with sixteen FK4Cu2 octahedra, edges with eight equivalent FK5Cu octahedra, and faces with four equivalent FK4Cu2 octahedra. The corner-sharing octahedra tilt angles range from 6–56°.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on K2CuF4 by Materials Project

K2CuF4 is (La,Ba)CuO4 structured and crystallizes in the tetragonal I4_1/acd space group. The structure is three-dimensional. K1+ is bonded in a 9-coordinate geometry to nine F1- atoms. There are a spread of K–F bond distances ranging from 2.64–2.97 Å. Cu2+ is bonded to six F1- atoms to form corner-sharing CuF6 octahedra. The corner-sharing octahedral tilt angles are 0°. There are a spread of Cu–F bond distances ranging from 1.95–2.25 Å. There are two inequivalent F1- sites. In the first F1- site, F1- is bonded to five equivalent K1+ and one Cu2+ atom to form distorted FK5Cu octahedra that share corners with seventeen FK5Cu octahedra, edges with eight equivalent FK5Cu octahedra, and faces with four equivalent FK4Cu2 octahedra. The corner-sharing octahedra tilt angles range from 0–58°. In the second F1- site, F1- is bonded to four equivalent K1+ and two equivalent Cu2+ atoms to form distorted FK4Cu2 octahedra that share corners with fourteen FK4Cu2 octahedra, edges with two equivalent FK4Cu2 octahedra, and faces with eight FK5Cu octahedra. The corner-sharing octahedra tilt angles range from 0–58°.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on KCuF3 by Materials Project

KCuF3 is (Cubic) Perovskite structured and crystallizes in the tetragonal I4/mcm space group. The structure is three-dimensional. K1+ is bonded to twelve F1- atoms to form KF12 cuboctahedra that share corners with twelve equivalent KF12 cuboctahedra, faces with six equivalent KF12 cuboctahedra, and faces with eight equivalent CuF6 octahedra. All K–F bond lengths are 2.88 Å. Cu2+ is bonded to six F1- atoms to form CuF6 octahedra that share corners with six equivalent CuF6 octahedra and faces with eight equivalent KF12 cuboctahedra. The corner-sharing octahedral tilt angles are 0°. There are a spread of Cu–F bond distances ranging from 1.98–2.10 Å. There are two inequivalent F1- sites. In the first F1- site, F1- is bonded in a distorted linear geometry to four equivalent K1+ and two equivalent Cu2+ atoms. In the second F1- site, F1- is bonded in a distorted linear geometry to four equivalent K1+ and two equivalent Cu2+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on KCuF3 by Materials Project

KCuF3 crystallizes in the tetragonal I4/mcm space group. The structure is three-dimensional. K1+ is bonded in a square co-planar geometry to four equivalent F1- atoms. All K–F bond lengths are 2.59 Å. Cu2+ is bonded in a square co-planar geometry to four F1- atoms. There is two shorter (1.87 Å) and two longer (1.92 Å) Cu–F bond length. There are two inequivalent F1- sites. In the first F1- site, F1- is bonded in a linear geometry to two equivalent Cu2+ atoms. In the second F1- site, F1- is bonded in a 3-coordinate geometry to two equivalent K1+ and one Cu2+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on KCuF3 by Materials Project

KCuF3 is (Cubic) Perovskite structured and crystallizes in the tetragonal P4/mmm space group. The structure is three-dimensional. K1+ is bonded to twelve F1- atoms to form KF12 cuboctahedra that share corners with twelve equivalent KF12 cuboctahedra, faces with six equivalent KF12 cuboctahedra, and faces with eight equivalent CuF6 octahedra. There are eight shorter (2.87 Å) and four longer (2.88 Å) K–F bond lengths. Cu2+ is bonded to six F1- atoms to form CuF6 octahedra that share corners with six equivalent CuF6 octahedra and faces with eight equivalent KF12 cuboctahedra. The corner-sharing octahedral tilt angles are 0°. There are two shorter (2.02 Å) and four longer (2.04 Å) Cu–F bond lengths. There are two inequivalent F1- sites. In the first F1- site, F1- is bonded in a distorted linear geometry to four equivalent K1+ and two equivalent Cu2+ atoms. In the second F1- site, F1- is bonded in a distorted linear geometry to four equivalent K1+ and two equivalent Cu2+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on K2CuF4 by Materials Project

K2CuF4 is (La,Ba)CuO4 structured and crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. K1+ is bonded in a 9-coordinate geometry to nine F1- atoms. There are a spread of K–F bond distances ranging from 2.65–2.93 Å. Cu2+ is bonded to six F1- atoms to form corner-sharing CuF6 octahedra. The corner-sharing octahedral tilt angles are 0°. There are two shorter (2.00 Å) and four longer (2.07 Å) Cu–F bond lengths. There are two inequivalent F1- sites. In the first F1- site, F1- is bonded to five equivalent K1+ and one Cu2+ atom to form distorted FK5Cu octahedra that share corners with seventeen FK5Cu octahedra, edges with eight equivalent FK5Cu octahedra, and faces with four equivalent FK4Cu2 octahedra. The corner-sharing octahedra tilt angles range from 0–56°. In the second F1- site, F1- is bonded to four equivalent K1+ and two equivalent Cu2+ atoms to form distorted FK4Cu2 octahedra that share corners with fourteen FK5Cu octahedra, edges with two equivalent FK4Cu2 octahedra, and faces with eight FK5Cu octahedra. The corner-sharing octahedra tilt angles range from 0–56°.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on KCuF3 by Materials Project

KCuF3 is (Cubic) Perovskite structured and crystallizes in the orthorhombic Pbca space group. The structure is three-dimensional. K1+ is bonded to twelve F1- atoms to form KF12 cuboctahedra that share corners with twelve equivalent KF12 cuboctahedra, faces with six equivalent KF12 cuboctahedra, and faces with eight CuF6 octahedra. There are a spread of K–F bond distances ranging from 2.87–2.94 Å. There are two inequivalent Cu2+ sites. In the first Cu2+ site, Cu2+ is bonded to six F1- atoms to form CuF6 octahedra that share corners with six equivalent CuF6 octahedra and faces with eight equivalent KF12 cuboctahedra. The corner-sharing octahedra tilt angles range from 0–1°. There are a spread of Cu–F bond distances ranging from 1.96–2.20 Å. In the second Cu2+ site, Cu2+ is bonded to six F1- atoms to form CuF6 octahedra that share corners with six equivalent CuF6 octahedra and faces with eight equivalent KF12 cuboctahedra. The corner-sharing octahedra tilt angles range from 0–1°. There are a spread of Cu–F bond distances ranging from 1.95–2.19 Å. There are three inequivalent F1- sites. In the first F1- site, F1- is bonded in a 6-coordinate geometry to four equivalent K1+ and two Cu2+ atoms. In the second F1- site, F1- is bonded in a distorted linear geometry to four equivalent K1+ and two Cu2+ atoms. In the third F1- site, F1- is bonded in a 2-coordinate geometry to four equivalent K1+ and two Cu2+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on K2CuF4 by Materials Project

K2CuF4 is (La,Ba)CuO4-like structured and crystallizes in the orthorhombic Cmce space group. The structure is three-dimensional. K1+ is bonded in a 9-coordinate geometry to nine F1- atoms. There are a spread of K–F bond distances ranging from 2.63–2.97 Å. Cu2+ is bonded to six F1- atoms to form corner-sharing CuF6 octahedra. The corner-sharing octahedral tilt angles are 0°. There are a spread of Cu–F bond distances ranging from 1.95–2.25 Å. There are two inequivalent F1- sites. In the first F1- site, F1- is bonded to four equivalent K1+ and two equivalent Cu2+ atoms to form distorted FK4Cu2 octahedra that share corners with fourteen FK5Cu octahedra, edges with two equivalent FK4Cu2 octahedra, and faces with eight FK5Cu octahedra. The corner-sharing octahedra tilt angles range from 0–58°. In the second F1- site, F1- is bonded to five equivalent K1+ and one Cu2+ atom to form distorted FK5Cu octahedra that share corners with seventeen FK5Cu octahedra, edges with eight equivalent FK5Cu octahedra, and faces with four equivalent FK4Cu2 octahedra. The corner-sharing octahedra tilt angles range from 0–58°.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on KCuF3 by Materials Project

KCuF3 is (Cubic) Perovskite-like structured and crystallizes in the tetragonal P4/mbm space group. The structure is three-dimensional. K1+ is bonded to twelve F1- atoms to form KF12 cuboctahedra that share corners with twelve equivalent KF12 cuboctahedra, faces with six equivalent KF12 cuboctahedra, and faces with eight equivalent CuF6 octahedra. There are eight shorter (2.88 Å) and four longer (2.92 Å) K–F bond lengths. Cu2+ is bonded to six F1- atoms to form CuF6 octahedra that share corners with six equivalent CuF6 octahedra and faces with eight equivalent KF12 cuboctahedra. The corner-sharing octahedral tilt angles are 0°. There are a spread of Cu–F bond distances ranging from 1.93–2.20 Å. There are two inequivalent F1- sites. In the first F1- site, F1- is bonded in a distorted linear geometry to four equivalent K1+ and two equivalent Cu2+ atoms. In the second F1- site, F1- is bonded in a 2-coordinate geometry to four equivalent K1+ and two equivalent Cu2+ atoms.

36 MATERIALS SCIENCE↗