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A Study on AB 2 X 5 Compounds (A: K, In, Tl; B: Sr, Sn, Pb; X: Cl, Br, I)
Author(s) -
Beck H. P.,
Clicqué G.,
Nau H.
Publication year - 1986
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.19865360505
Subject(s) - monoclinic crystal system , tetragonal crystal system , crystallography , lattice constant , chemistry , crystal structure , phase diagram , lattice (music) , analytical chemistry (journal) , diffraction , physics , phase (matter) , organic chemistry , optics , chromatography , acoustics
Abstract The synthesis and the lattice constants of AB 2 X 5 compounds with A = K, In, B = Sr, Sn, Pb and X = Cl, Br, I are reported. All compounds have either the monoclinic NH 4 Pb 2 Cl 5 or the tetragonal NH 4 Pb 2 Br 5 structure. For KPb 2 Br 5 the former is shown to be the high temperature form and the latter is obtained under high pressure. It is shown that all known compounds of this family can clearly be separated with respect to their structure in a structure field diagram on the basis of the size relations A/X and B/X.