Crystal structures of Eu(II) substituted barium magnesium fluorides:: Ba0.78(3)Eu0.22(3)MgF4 and Ba5.20(6)Eu0.80(6)Mg7F26

被引：10

作者：

Kubel, F ^{[1
]}

Hagemann, H ^{[1
]}

Bill, H ^{[1
]}

机构：

[1] Univ Geneva, Dept Chim Phys, CH-1211 Geneva 4, Switzerland

来源：

ZEITSCHRIFT FUR KRISTALLOGRAPHIE | 1999年 / 214卷 / 03期

关键词：

D O I：

10.1524/zkri.1999.214.3.139

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

Barium in BaMgF4 and in Ba6Mg7F26 can be partially replaced by Sr or Eu. The single crystal structural analysis of the title compounds (a = 409.06 pm, b = 1452.7 pm, c = 579.02 pm, space group Cmc2(1) for Ba-0.78(3)Eu-0.22(3)MgF4 [Z = 2, R-w = 0.023 for 998 reflections] and a = 583.47 pm, b = 1209.09 pm and c = 1506.56 pm, space group Immm for Ba-5.20(6)Eu-0.80(6). Mg7F26) MgF4 [Z = 2, R-w = 0.019 for 2694 reflections] confirms the substitution of barium by europium. A split refinement of the substituted barium site in both crystals reveals a trend of europium to get closer to the nearest fluoride neighbors by simultaneously reducing the coordination sphere.

引用

页码：139 / 142

页数：4

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