Crystal structures of the compounds PrAl2Si2, Pr3Al4Si6 and PrAlSi2

被引：10
|
作者：
Muts, N [1 ]
Gladyshevskii, R [1 ]
Gladyshevskii, E [1 ]
机构：
[1] Ivan Franko Natl Univ Lviv, Dept Inorgan Chem, UA-79005 Lvov, Ukraine
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2005年 / 402卷 / 1-2期
关键词：
rare-earth alumosilicide; X-ray powder diffraction; crystal structure;
D O I：
10.1016/j.jallcom.2004.11.097
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：
During a search for new compounds crystallizing with the Ce3Al4Si6 and CeAlSi2 structure types, the new compounds Pr3Al4Si6 and PrAlSi2 were found. The crystal structures of these compounds and of PrAl2Si2 (CaAl2Si2-type structure) were refined from X-ray powder diffraction data. (PrAl2S6: P3m1, a = 4.2096(2) angstrom, c = 6.8422(3) angstrom, Z= 1; Pr3Al4Si6: P3m1, a = 4.18050(9) angstrom, c = 17.9793(5) angstrom, Z= 1; PrAlSi2: P3m1, a = 4. 1615(2) angstrom, c = 11.1312(7) angstrom, Z= 2). The structures of Pr3Al4Si6 and PrAlSi2 belong to a homologous series of general formula Rm+nAl2nSi2n+2m, where m and n are the numbers of AlB2- and CaAl2Si2-type slabs, respectively. (c) 2005 Elsevier B.V. All rights reserved.
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页码：66 / 69
页数：4
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