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The Solid Solutions M 19 Q 6 X 7 with M = Ag, Cu; Q = S, Se, Te and X = S, Se, Te
Author(s) -
Nilges Tom
Publication year - 2008
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.200800128
Subject(s) - crystallography , solid solution , crystal structure , type (biology) , structure type , x ray crystallography , chemistry , materials science , analytical chemistry (journal) , diffraction , physics , metallurgy , ecology , optics , biology , chromatography
X‐ray powder diffraction, EDX‐ and DSC measurements were performed in order to determine the structural and thermal properties of the solid solutions Ag 19 Te 6 Br 7− x Cl x , Ag 19 Te 6 Br 7− y I y , Ag 19 Te 6− a S a Br 7 , Ag 19 Te 6− b Se b Br 7 and Ag 19− z Cu z Te 6 Br 7 . Three different structure types, the Ag 19 Te 6 Br 7 , the Ag 19 Te 5 SeBr 7 and the Ag 19 Te 6 Br 5.4 I 1.6 type are realized, dependent on the type and grade of substitution. The Ag 19 Te 6 Br 7 structure type is present for the solid solutions Ag 19 Te 6 Br 7− x Cl x , Ag 19 Te 6− a S a Br 7 and Ag 19− z Cu z Te 6 Br 7 . For b ≥1 in case of Ag 19 Te 6− b Se b Br 7 and for y ≥1.25 in Ag 19 Te 6 Br 7− y I y the Ag 19 Te 6 Br 7 structure type is replaced by the Ag 19 Te 5 SeBr 7 and the Ag 19 Te 6 Br 5.4 I 1.6 structure type. All compounds show peritectic decomposition to the binary compounds Ag 23 Te 12 Br and Ag 5 Te 2 Cl, respectively.