Preparation and structures of CsGd2Cu3Se5 and CsTb2Cu3Se5

被引：5

作者：

Ijjaali, I ^{[1
]}

Ibers, JA ^{[1
]}

机构：

[1] Northwestern Univ, Dept Chem, Evanston, IL 60208 USA

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2003年 / 353卷 / 1-2期

基金：

美国国家科学基金会;

关键词：

synthesis; crystal structure; solid-state compound; rare-earth; chalcogenide; copper;

D O I：

10.1016/S0925-8388(02)01311-7

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The compounds CsGd2Cu3Se5 and CsTb2Cu3Se5 have been obtained through the reaction of CsCl, Gd2Se3 or Tb2Se3, and Cu2Se at 1123 K. These compounds crystallize in the RbSm2Ag3Se5 structure type with four formula units in the space group Cnicin of the orthorhombic system in cells of dimensions at 153 K of a = 4.1417(3) Angstrom, b = 14.6422(9) Angstrom, c = 17.4543(11) Angstrom, V = 1058.49(12) Angstrom(3) for CsGd2Cu3Se5 and a = 4.1268(4) Angstrom, b = 14.6204(14) Angstrom, c = 17.3390(16) Angstrom, V = 1046.16(17) Angstrom(3) for CsTb2Cu3Se5. This structure consists of ten-membered pentagonal rings in which the alkali-metal atoms are situated. The three-dimensional anionic framework is built from LnSe(6) octahedra and CuSe4 tetrahedra. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：124 / 127

页数：4

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