RHENIUM SELENIDETELLURIDES RE2SEXTE5-X - THE STRUCTURE OF RE6SE8TE7

被引：18
作者：
HARBRECHT, B
SELMER, A
机构：
[1] Institut Für Anorganische Chemie, Universität Bonn
来源：
ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE | 1994年 / 620卷 / 11期
关键词：
RE6SE8TE7; RHENIUM CHALCOGENIDES CLUSTER COMPOUNDS; SYNTHESIS; CRYSTAL STRUCTURE;
D O I：
10.1002/zaac.19946201105
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
Well-crystallized rhenium selenidetellurides of the Re2Te5-type structure were prepared from the elements in evacuated sealed quartz glas tubes at 1130 K within 14 d. The orthorhombic lattice parameters of the phases shrink with increasing selenium content from a = 1304.9(1) - 1255.8(2) pm, b = 1297.5(1)-1260.0(2)pm, and c = 1425.1(1)-1408.2(1)pm. The phase width ends at composition Re2Se2,7Te2,3. An X-ray structure analysis of a crystal of composition Re6Se8Te7 was performed. Selenium and tellurium atoms differ structurally completely: Whereas the selenium atoms are separated within distorted octahedral [Re6Se8] clusters, the tellurium atoms form homonuclear bonded bicyclic [Te(Te-3)(2)] units. They also link the clusters which are arranged according to the motif of a cubic closest packing.
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页码：1861 / 1866
页数：6
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