RMX compounds formed by alkaline earths, europium and ytterbium .4. Ternary phases with M=Ag and X=Si, Ge, Sn, Pb

被引：50

作者：

Merlo, F

Pani, M

Fornasini, ML

机构：

[1] Istituto di Chimica Fisica, Università di Genova, I-16132 Genova

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 1996年 / 232卷 / 1-2期

关键词：

intermetallic compounds; rare earths; alkaline earths;

D O I：

10.1016/0925-8388(95)01952-9

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：

The ternary RAgX phases, with R = Ca, Sr, Ba, Eu, Yb and X = Si, Ge, Sn, Pb, were structurally studied by means of X-ray diffraction on powders and single crystals. The tin and lead compounds exist on the equiatomic composition and crystallize in the CeCu2, CaLiSn and YbAgPb types. The silicon and germanium compounds are in most cases nonstoichiometric and belong to the CeCu2 and AlB2 types, and to three new variants of the AlB2 structure: SrAgGe, Ba3Ag2Si3, Ca5Ag2Si7. The influence of the electron concentration factor on the stability of the different atomic arrangements is pointed out.

引用

页码：289 / 295

页数：7

共 21 条

[1]

BUERGER MJ, 1962, XRAY CRYSTALLOGRAPHY, P426

[2] STABILITY-CRITERIA FOR ALB2 STRUCTURES [J].