RGe2-x compounds (R = Y, Gd-Ho) with new ordered ThSi2-defect structures

被引：21

作者：

Venturini, G ^{[1
]}

Ijjaali, I ^{[1
]}

Malaman, B ^{[1
]}

机构：

[1] Univ Nancy 1, CNRS, UMR 7555, Lab Chim Solide Min, F-54506 Vandoeuvre Nancy, France

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 1999年 / 285卷 / 1-2期

关键词：

rare earth germanides; crystal structure determination; defect structures; vacancy ordering;

D O I：

10.1016/S0925-8388(99)00030-4

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 R-Ge systems (R = Y, Gd-Ho) have been investigated in the composition range 60-65 Ge at.% and the ThSi,-type RGe2-x compounds have been checked by X-ray powder diffraction. Besides the well-known Y3Ge5-type R3Ge5 compounds, 14 new ordered ThSi2-defect derivatives have been characterized. Some structural hypothesis are made and the crystal structures of the Dy11Ge18, Ho14Ge23, Gd(17)Ge(29 )have been refined from powder X-ray diffraction. The evolution in the structural series is discussed and compared with the evolution in the AlB2 defect derivatives. (C) 1999 Elsevier Science S.A. all rights reserved.

引用

页码：194 / 203

页数：10

共 15 条

[1] METALLURGICAL AND PHYSICAL STUDY OF PRASEODYMIUM DISILICIDES AND DIGERMANIDES [J].

BOUTAREK, N ;

PIERRE, J ;

LAMBERTANDRON, B ;

LHERITIER, P ;

MADAR, R .

JOURNAL OF ALLOYS AND COMPOUNDS, 1994, 204 (1-2) :251-260

[2]

Bruskov V. A., 1983, Soviet Physics - Crystallography, V28, P151

[3] CRYSTAL-STRUCTURE AND PROPERTIES OF TETRAGONAL CEGE1.6 [J].

LAMBERTANDRON, B ;

HOUSSAY, E ;

MADAR, R ;

HIPPERT, F ;

PIERRE, J ;

AUFFRET, S .

JOURNAL OF THE LESS-COMMON METALS, 1990, 167 (01) :53-63

[4] THE EFFECT OF SILICON VACANCIES ON THE ELECTRONIC-STRUCTURE OF YTTRIUM DISILICIDE [J].

MAGAUD, L ;

JULIEN, JP ;

CYROTLACKMANN, F .

JOURNAL OF PHYSICS-CONDENSED MATTER, 1992, 4 (24) :5399-5404

[5] RARE-EARTH OVERLAYERS ON SILICON [J].

NETZER, FP .

JOURNAL OF PHYSICS-CONDENSED MATTER, 1995, 7 (06) :991-1022

[6] RECENT ADVANCES IN MAGNETIC-STRUCTURE DETERMINATION BY NEUTRON POWDER DIFFRACTION [J].

RODRIGUEZCARVAJAL, J .

PHYSICA B, 1993, 192 (1-2) :55-69

[7] YTTRIUM-GERMANIUM SYSTEM [J].

SCHMIDT, FA ;

MCMASTERS, OD ;

CARLSON, ON .

JOURNAL OF THE LESS-COMMON METALS, 1972, 26 (01) :53-+

[8] CRYSTALLOGRAPHIC AND MAGNETIC-STRUCTURE OF DY3GE5 AND DYGE1.9 [J].

SCHOBINGERPAPAMANTELLOS, P ;

DEMOOIJ, DB ;

BUSCHOW, KHJ .

JOURNAL OF THE LESS-COMMON METALS, 1990, 163 (02) :319-330

[9] MODULATED STRUCTURE AND FERROMAGNETIC ORDERING IN PRGE1.60 STUDIED BY NEUTRON-DIFFRACTION AND MAGNETIC MEASUREMENTS [J].

SCHOBINGERPAPAMANTELLOS, P ;

DEMOOIJ, DB ;

BUSCHOW, KHJ .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1990, 89 (1-2) :47-55

[10] MODULATED STRUCTURE AND WEAK FERROMAGNETISM IN ND3GE5 STUDIED BY NEUTRON-DIFFRACTION AND MAGNETIC MEASUREMENTS [J].

SCHOBINGERPAPAMANTELLOS, P ;

BUSCHOW, KHJ .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1989, 82 (01) :99-108

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