Synthesis and crystal structure of (NH4)(3)Cu4Ho2Br13. Further bromides of the (NH4)(3)Cu(4)M(2)Br(13) type (M=Dy-Lu, Y) and on Rb3Cu4Ho2Br13

被引:2
|
作者
Wickleder, MS [1 ]
Bohnsack, A [1 ]
Meyer, G [1 ]
机构
[1] SONDERFORSCH BEREICH 173,HANNOVER,GERMANY
来源
关键词
rare earths; bromides; copper; synthesis; crystal structure;
D O I
10.1002/zaac.19966220417
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
Single crystals of (NH4)(3)Cu4Ho2Br13 were obtained for the first time from the reaction of CuBr with HoBr3 which was contaminated with NH4Br: cubic, space group Pn(3) over bar, Z = 2, a = 1101.71(5)pm. The crystal structure may be considered as a variant of the fluorite type according to [(HoBr6)(4)][(NH4)(6)(Cu4Br)2] = Ca4F8. Pure products can be prepared from the binary halides in glass ampoules at 350 degrees C. The bromides (NH4)(3)Cu(4)M(2)Br(13) (M = Dy-Lu, Y) and Rb3Cu4Ho2Br13 are isotypic with (NH4)(3)Cu4Ho2Br13.
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页码:675 / 678
页数:4
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