RARE-EARTH SULFIDE OXIDES ER2S2O, TM2S2O, YB2S2O - HIGH-PRESSURE SYNTHESIS AND CRYSTAL-STRUCTURE

被引：29

作者：

RANGE, KJ

LANGE, KG

GIETL, A

机构：

来源：

JOURNAL OF THE LESS-COMMON METALS | 1990年 / 158卷 / 01期

关键词：

D O I：

10.1016/0022-5088(90)90440-U

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：

A new class of rare earth sulphide oxides Ln2S2O (Ln ≡ Er, Tm, Yb) is reported, which can be synthesized at high pressure in a Belt-type apparatus. Single crystals of Tm2S2O, grown by an iodide-flux method at 10 kbar and 1600°C, are monoclinic, space group P21/c, with a = 8.1556(1), b = 6.7960(1), c = 6.7739(1) A ̊, β = 99.844(2)° and Z = 4. Er2S2O and Yb2S2O are isostructural (Er2S2O: a = 8.1920(1), b = 6.8326(1), c = 6.8050(1) A ̊, β = 99.631(2)°; Yb2S2O: a = 8.1181(2), b = 6.7616(2), c = 6.7403(2) A ̊, β = 99.922(3)°). The crystal structure comprises two different cation sites, which are (7)o- and (7)p-coordinated by the anions. The coordination polyhedra and their rather complicated connection pattern show more similarities to the sesquisulphides Ln2S3 than to the sesquioxides Ln2O3. © 1990.

引用

页码：137 / 145

页数：9

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