氘化锂铍Li2BeD4的合成与晶体结构

Synthesis and crystal structure of lithium beryllium deuteride Li2BeD4.

作者信息

Bulychev Boris M, Shpanchenko Roman V, Antipov Evgeny V, Sheptyakov Denis V, Bushmeleva Svetlana N, Balagurov Anatoly M

机构信息

Department of Chemistry, Moscow State University, 119992 Moscow, Russia.

出版信息

Inorg Chem. 2004 Oct 4;43(20):6371-6. doi: 10.1021/ic049267f.

DOI:10.1021/ic049267f

PMID:15446886

Abstract

Single-phase ternary deuteride Li(2)BeD(4) was synthesized by a high-pressure high-temperature technique from LiD and BeD(2). The crystal structure of Li(2)BeD(4) was solved from X-ray and neutron powder diffraction data. The compound crystallizes in the monoclinic space group P2(1)/c with lattice parameters a = 7.06228(9) A, b = 8.3378(1) A, c = 8.3465(1) A, beta =93.577(1) degrees, and Z = 8. Its structure contains isolated BeD(4) tetrahedra and Li atoms that are located in the structure interstices. Li(2)BeD(4) does not undergo any structural phase transitions at temperatures down to 8 K.

摘要

通过高压高温技术由LiD和BeD₂合成了单相三元氘化物Li₂BeD₄。根据X射线和中子粉末衍射数据解析了Li₂BeD₄的晶体结构。该化合物结晶于单斜空间群P2(1)/c，晶格参数a = 7.06228(9) Å，b = 8.3378(1) Å，c = 8.3465(1) Å，β = 93.577(1)°，Z = 8。其结构包含孤立的BeD₄四面体和位于结构间隙中的Li原子。Li₂BeD₄在温度低至8 K时不发生任何结构相变。