METALLOTHERMIC REDUCTION OF THE TRIBROMIDE AND TRIBRIODIDE OF DYSPROSIUM WITH ALKALI-METALS

被引：16

作者：

HOHNSTEDT, C ^{[1
]}

MEYER, G ^{[1
]}

机构：

[1] UNIV HANNOVER,INST ANORGAN CHEM,CALLINSTR 9,D-30167 HANNOVER,GERMANY

来源：

ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE | 1993年 / 619卷 / 08期

关键词：

METALLOTHERMIC REDUCTION; DIBROMIDES; DIIODIDES; TERNARY HALIDES; DYSPROSIUM; CRYSTAL STRUCTURE;

D O I：

10.1002/zaac.19936190809

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Metallothermic reduction (900-1000-degrees-C, 2 - 3 d, tantalum capsules) of DyX3 (X = Br, 1) with alkali metals (A = Li-Cs) results in the case of lithium and sodium (except for the system DyBr3/Li) in the formation of the dihalides DyX2 (DyI2 with the CdCl2-type, DyBr2 with the SrI2-type of structure). The reduction of DyI3 with potassium leads to K1.71DyI4 which crystallizes hexagonally with a = 1446.7(2)pm and c = 473.3(1)pm, space group P62mBAR (Z = 3). In K1.71DyI4, [DyI6]-octahedra are edge-connected forming chains along [001] that are linked via K+. With A = K, Rb, Cs, variants of the perovskite-type of structure with the composition ADyX3 are obtained. They crystallize with the tetragonal NaNbO3-II-type (CsDyBr3) or with the orthorhombic GdFeO3-type of structure (KDyBr3, RbDyX3, CsDyI3).

引用

页码：1374 / 1378

页数：5

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