AN X-RAY STUDY OF THE POLYMORPHISM IN THALLIUM MONOSULFIDE - THE STRUCTURE OF 2 TETRAGONAL FORMS

被引：29

作者：

KASHIDA, S

NAKAMURA, K

机构：

[1] Department of Physics, Niigata University, Niigata, 950-21, Ikarashi

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 1994年 / 110卷 / 02期

关键词：

D O I：

10.1006/jssc.1994.1168

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Thallium monosulfide is a mixed valence compound, as represented by the formula Tl(I)Tl(III)S2. Two different structures with tetragonal symmetry are identified in TlS. The first is space group I4/mcm: a = b = 7.785(2), c = 6.802(2) angstrom, and Z = 8 (the TlSe type). The structure is characterized by chains formed of edge-connected Tl(III)S4 tetrahedra. Monovalent Tl(I) ions are located between the chains and have eightfold antiprismatic coordination of the sulfur ions. The second is space group P4(1)2(1)2: a = b = 7.803(9), c = 29.55(2) angstrom, and Z = 32. The structure is characterized by layers formed of comer-connected Tl(III)S4 tetrahedra. Monovalent Tl(I) ions are located between the layers and have sevenfold capped trigonal coordination of the sulfur ions. (C) 1994 Academic Press, Inc.

引用

页码：264 / 269

页数：6

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