Synthesis and crystal structures of Cs2MgD4 and Cs3MgD5

被引：9

作者：

Bertheville, B

Fischer, P

Yvon, K

机构：

[1] Univ Geneva, Lab Cristallog, CH-1211 Geneva 4, Switzerland

[2] ETH Zurich, Neutron Scattering Lab, CH-5232 Villigen, Switzerland

[3] Paul Scherrer Inst, CH-5232 Villigen, Switzerland

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2000年 / 302卷 / 1-2期

关键词：

caesium magnesium deuterides; saline hydrides; neutron powder diffraction; crystal structure;

D O I：

10.1016/S0925-8388(00)00688-5

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 title compounds were prepared by sintering stoichiometric mixtures of the binary deuterides in an autoclave under 65 bar pressure at 625 K. Neutron powder diffraction reveals a beta-K2SO4 type structure for Cs2MgD4 (space group Pmna, a = 8.5988(4), b = 6.6234(3), c = 11.5988(5) Angstrom) and a Cs3CoCl5 type structure for Cs3MgD5 (space group I4/mcm, a = 8.4022(2), c = 12.6951(4) Angstrom). In both deuterides magnesium is tetrahedrally coordinated by deuterium. The Mg-D bond distances (1.82-1.88 Angstrom in Cs2MgD4 and 1.84 Angstrom in Cs3MgD5) are longer by 0.02 Angstrom, on the average, than those in the corresponding rubidium analogues. (C) 2000 Elsevier Science S.A. All rights reserved.

引用

页码：L12 / L16

页数：5

共 17 条

[1] SYNTHESIS AND STRUCTURE DETERMINATION OF COMPLEX ZINC HYDRIDES .1. DIPOTASSIUMTETRAHYDRIDOZINCATE(II) - K-2[ZNH4] [J].