Crystal structures of the R3Mg0.5GeS7 (R = Y, Ce, Pr, Nd, Sm, Gd, Tb, Dy, Ho and Er) compounds

被引：0
|
作者：
Huch, M.R. [1 ]
Gulay, L.D. [1 ]
Olekseyuk, I.D. [1 ]
机构：
[1] Department of General and Inorganic Chemistry, Volyn State University, Voli Ave 13, 43009 Lutsk, Ukraine
来源：
Journal of Alloys and Compounds | 2006年 / 424卷 / 1-2期
关键词：
The crystal structures of the R3Mg0.5GeS7 (R = Y; Ce; Pr; Nd; Sm; Gd; Tb; Dy; Ho and Er) compounds (La3CuSiS7 structure type; space group P63; Pearson symbol hP23) were determined by means of X-ray powder diffraction: a = 0.9788(1) nm; c; 0.57745(5); nm; RBragg; 0.0814; (Y3Mg0.5GeS7); a; 1.0262(2); 0.57849(7); 0.0687; (Ce3Mg0.5GeS7); 1.01249(3); 0.58040(2); 0.0832; (Pr3Mg0.5GeS7); 1.00701(3); 0.58047(3); 0.0636; (Nd3Mg0.5GeS7); 0.99500(3); 0.57872(3); 0.0870; (Sm3Mg0.5GeS7); 0.99319(3); 0.57083(3); 0.0901; (Gd3Mg0.5GeS7); 0.98007(5); 0.57843(4); 0.0859; (Tb3Mg0.5GeS7); 0.97698(4); 0.57675(5); 0.0931; (Dy3Mg0.5GeS7); 0.9735(2); 0.57941(7); 0.0763; (Ho3Mg0.5GeS7); 0.9694(2); 0.57994(7); RBragg = 0.0724 (Er3Mg0.5GeS7). The R-centered trigonal prisms; Mg-centered octahedra and Ge-centered tetrahedra can be selected in the crystal structure of the R3Mg0.5GeS7 compounds. © 2005 Elsevier B.V. All rights reserved;
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