Premium
(H 3 O) 3 Sb 2 Br 9 : the first member of the M 3 E 2 X 9 structure family with oxonium cations
Author(s) -
Chang Jen-Hui,
Doert Thomas,
Ruck Michael
Publication year - 2016
Publication title -
acta crystallographica section c
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 17
ISSN - 2053-2296
DOI - 10.1107/s2053229616017198
Subject(s) - crystallography , octahedron , crystal structure , perovskite (structure) , stacking , single crystal , x ray crystallography , chemistry , metastability , solid solution , materials science , diffraction , physics , organic chemistry , optics
(H 3 O) 3 Sb 2 Br 9 [trihydroxonium enneabromidodiantimonate(III)] is the first representative of the M 3 E 2 X 9 family ( M = cation, E = Sb and Bi, and X = Br and I) with oxonium cations. The metastable compound was obtained in trace amounts from a solution of CsBr and SbBr 3 in concentrated aqueous HBr. Single crystals were isolated from the mother liquor and investigated by single‐crystal X‐ray diffraction at 100 K. (H 3 O) 3 Sb 2 Br 9 crystallizes with the Tl 3 Bi 2 I 9 structure type, which is a distorted defect variant of cubic perovskite. The crystal structure comprises characteristic 2 ∞ [SbBr 3 Br 3/2 ] double layers of corner‐sharing SbBr 6 octahedra with a [001] stacking direction. Due to the small size of the H 3 O + cation and O—H…Br hydrogen bonding, the octahedra are tilted.