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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on KAlCl4 by Materials Project

KAlCl4 crystallizes in the monoclinic P2_1 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 Cl1- atoms. There are a spread of K–Cl bond distances ranging from 3.31–3.91 Å. In the second K1+ site, K1+ is bonded in a 7-coordinate geometry to seven Cl1- atoms. There are a spread of K–Cl bond distances ranging from 3.30–3.66 Å. There are two inequivalent Al3+ sites. In the first Al3+ site, Al3+ is bonded in a tetrahedral geometry to four Cl1- atoms. There are a spread of Al–Cl bond distances ranging from 2.15–2.17 Å. In the second Al3+ site, Al3+ is bonded in a tetrahedral geometry to four Cl1- atoms. There are a spread of Al–Cl bond distances ranging from 2.15–2.17 Å. There are eight inequivalent Cl1- sites. In the first Cl1- site, Cl1- is bonded in a distorted single-bond geometry to two K1+ and one Al3+ atom. In the second Cl1- site, Cl1- is bonded in a distorted single-bond geometry to two equivalent K1+ and one Al3+ atom. In the third Cl1- site, Cl1- is bonded in a 1-coordinate geometry to two equivalent K1+ and one Al3+ atom. In the fourth Cl1- site, Cl1- is bonded in a distorted single-bond geometry to two K1+ and one Al3+ atom. In the fifth Cl1- site, Cl1- is bonded in a distorted single-bond geometry to two K1+ and one Al3+ atom. In the sixth Cl1- site, Cl1- is bonded in a distorted single-bond geometry to one K1+ and one Al3+ atom. In the seventh Cl1- site, Cl1- is bonded in a distorted single-bond geometry to three K1+ and one Al3+ atom. In the eighth Cl1- site, Cl1- is bonded in a 1-coordinate geometry to two equivalent K1+ and one Al3+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on K3AlCl6 by Materials Project

K3AlCl6 is (Cubic) Perovskite-like structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. there are two inequivalent K1+ sites. In the first K1+ site, K1+ is bonded to twelve equivalent Cl1- atoms to form KCl12 cuboctahedra that share corners with twelve equivalent KCl12 cuboctahedra, faces with six equivalent KCl12 cuboctahedra, faces with four equivalent KCl6 octahedra, and faces with four equivalent AlCl6 octahedra. All K–Cl bond lengths are 3.76 Å. In the second K1+ site, K1+ is bonded to six equivalent Cl1- atoms to form KCl6 octahedra that share corners with six equivalent AlCl6 octahedra and faces with eight equivalent KCl12 cuboctahedra. The corner-sharing octahedral tilt angles are 0°. All K–Cl bond lengths are 2.96 Å. Al3+ is bonded to six equivalent Cl1- atoms to form AlCl6 octahedra that share corners with six equivalent KCl6 octahedra and faces with eight equivalent KCl12 cuboctahedra. The corner-sharing octahedral tilt angles are 0°. All Al–Cl bond lengths are 2.34 Å. Cl1- is bonded in a distorted linear geometry to five K1+ and one Al3+ atom.

36 MATERIALS SCIENCE↗