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Single crystal X-ray analysis of YGexcompounds (1<x<3).

Authors :
Ijjaali, I
Venturini, G
Malaman, B
Source :
Journal of Alloys and Compounds; March 1999, Vol. 284 Issue: 1-2 p237-242, 6p
Publication Year :
1999

Abstract

The structures of the Y3Ge4, YGe1.82and YGe2.69compounds are refined from X-ray single-crystal data. Y3Ge4is isotypic with Er3Ge4. YGe1.82(isotypic with ErGe1.83) and YGe2.69(isotypic with DyGe3) compounds are both characterized by the occurrence of germanium vacancies which are localized, at random within AlB2slabs or, in a double layer of Ge atoms, respectively. In the latter case, very weak unindexed additional diffracted intensities in the Weissenberg patterns suggest a long-range ordering of these vacancies. Single crystal studies of several AlB2- and ThSi2-types YGe≤2derivatives clearly evidence large supercells which should also be related to various orderings of the Ge vacancies.

Details

Language :
English
ISSN :
09258388
Volume :
284
Issue :
1-2
Database :
Supplemental Index
Journal :
Journal of Alloys and Compounds
Publication Type :
Periodical
Accession number :
ejs3448712
Full Text :
https://doi.org/10.1016/S0925-8388(98)00941-4