Ternary halides of the A(3)MX(6) type .6. Ternary chlorides of the rare-earth elements with lithium, Li3MCl6 (M=Tb-Lu, Y, Sc): Synthesis, crystal structures, and ionic motion

被引：84

作者：

Bohnsack, A ^{[1
]}

Stenzel, F ^{[1
]}

Zajonc, A ^{[1
]}

Balzer, G ^{[1
]}

Wickleder, MS ^{[1
]}

Meyer, G ^{[1
]}

机构：

[1] INST ANORGAN CHEM & SONDERFOSCH BERIECH 173,HANNOVER,GERMANY

来源：

ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE | 1997年 / 623卷 / 07期

关键词：

lithium; rare earth halides; crystal structures; ionic motion;

D O I：

10.1002/zaac.19976230710

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Single crystal X-ray studies on the ternary chlorides Li3ErCl6, Li3YbCl6 and Li3ScCl6 show that they crystallize in three different structure types. Li3ErCl6 (trigonal, <P(3)over bar m1>, Z=3, a=1117.7(2); c=603.6(2) pm; the chlorides with M=Tb-Tm, Y are isotypic) and Li3YbCl6 (orthorhombic, Pnma, Z=4, a=1286.6(1); b=1113.2(1); c=602.95(8) pm; Li3LuCl6 is isotypic) have very similar structures that may be derived from hexagonal closest packings of chloride ions with the cations occupying octahedral holes in part statistically. Li3ScCl6 (monoclinic, C2/m, Z=2, a=639.8(1); b=1104.0(2); c=639.1(1) pm; beta=109.89(1)degrees) crystallizes isotypic with Na3GdI6 and Li3ErBr6, structures that may be derived from a cubic closest packings of anions. The ionic movement in Li3YCl6 and Li3YbCl6 has been investigated by impedance and Li-7-NMR spectroscopy.

引用

页码：1067 / 1073

页数：7

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