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Synthesis and crystal structure of a new quaternary chalcoantimonide: KLa2Sb3S9 and KSm2Sb 3Se8

Title
Synthesis and crystal structure of a new quaternary chalcoantimonide: KLa2Sb3S9 and KSm2Sb 3Se8
Authors
Kim S.-J.Park S.Yim S.
Ewha Authors
김성진
SCOPUS Author ID
김성진scopus
Issue Date
2004
Journal Title
Bulletin of the Korean Chemical Society
ISSN
0253-2964JCR Link
Citation
vol. 25, no. 4, pp. 485 - 490
Indexed
SCI; SCIE; SCOPUS; KCI WOS scopus
Abstract
Silver-needle shaped crystals of KLa2Sb3S 9 from K2Sx flux and KSm2Sb 3Se8 from NaCl/KCl flux reactions were obtained and their crystal structures were determined by the single crystal X-ray diffraction method. KLa2Sb3S9 crystallizes in the orthorhombic noncentrosymmetric space group P21212 1 (No. 19) with a unit cell of a = 4.220(3) Å, b = 24.145(2) Å, c = 14.757(5) Å and Z = 4. KSm2Sb3Se 8 crystallizes in the orthorhombic space group Pnma (No.62) with a unit cell of a = 16.719(3) Å, b = 4.1236(8) Å, c = 22.151(4) Å and Z = 4. Both structures have three-dimensional tunnel frameworks filled with K+ ions. KSm2Sb3Se8 is an ordered version of ALn1 ± xBi4 ± xS 8, and it is made up of NaCl-type and Gd2S 3-type fragments. KLa2Sb3S9 also contains building fragments similar to those of KSm2Sb 3Se8, however, there are chalcogen-chalcogen bonds in the Gd2S3-type fragment. The formula of KLa2Sb 3S9 can be described as (K+)(La 3+)2(Sb3+)3(S2-) 7(S2 2-).
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자연과학대학 > 화학·나노과학전공 > Journal papers
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