Materials Data on KAlNiF6 by Materials Project

Dataset · Thu Apr 30 04:00:00 EDT 2020

DOI:https://doi.org/10.17188/1680500· OSTI ID:1680500

KNiAlF6 crystallizes in the orthorhombic Imma space group. The structure is three-dimensional. K1+ is bonded to six F1- atoms to form distorted KF6 octahedra that share corners with six equivalent NiF6 octahedra and corners with six equivalent AlF6 octahedra. The corner-sharing octahedra tilt angles range from 63–74°. There are a spread of K–F bond distances ranging from 2.82–3.34 Å. Ni2+ is bonded to six F1- atoms to form NiF6 octahedra that share corners with two equivalent NiF6 octahedra, corners with four equivalent AlF6 octahedra, and corners with six equivalent KF6 octahedra. The corner-sharing octahedra tilt angles range from 44–71°. There are two shorter (1.99 Å) and four longer (2.03 Å) Ni–F bond lengths. Al3+ is bonded to six F1- atoms to form AlF6 octahedra that share corners with two equivalent AlF6 octahedra, corners with four equivalent NiF6 octahedra, and corners with six equivalent KF6 octahedra. The corner-sharing octahedra tilt angles range from 32–74°. There is four shorter (1.81 Å) and two longer (1.85 Å) Al–F bond length. There are three inequivalent F1- sites. In the first F1- site, F1- is bonded in a bent 150 degrees geometry to one K1+ and two equivalent Al3+ atoms. In the second F1- site, F1- is bonded in a distorted trigonal planar geometry to one K1+ and two equivalent Ni2+ atoms. In the third F1- site, F1- is bonded in a 2-coordinate geometry to one K1+, one Ni2+, and one Al3+ atom.

• Research Organization: LBNL Materials Project; Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
• Contributing Organization: The Materials Project; MIT; UC Berkeley; Duke; U Louvain
• DOE Contract Number: AC02-05CH11231
• OSTI ID: 1680500
• Report Number(s): mp-1223554
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
Al-F-K-Ni
KAlNiF6
crystal structure