ORTHORHOMBIC MG4IRD5 WITH DISORDERED DEUTERIUM DISTRIBUTION

被引：13

作者：

BONHOMME, F

STETSON, NT

YVON, K

FISCHER, P

HEWAT, AW

机构：

[1] SWISS FED INST TECHNOL,NEUTRONENSTREUUNG LAB,CH-8092 ZURICH,SWITZERLAND

[2] PAUL SCHERRER INST,CH-5232 VILLIGEN PSI,SWITZERLAND

[3] INST MAX VON LAUE PAUL LANGEVIN,F-38042 GRENOBLE,FRANCE

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 1993年 / 200卷

关键词：

D O I：

10.1016/0925-8388(93)90472-Y

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：

Mg4IrH5 and its deuteride was synthesized by the reaction of magnesium and iridium powders with hydrogen (deuterium) at high pressure (41-100 bar) and high temperature (723-783 K). The structure was determined by X-ray and neutron powder diffraction. This compound crystallizes with a new structure type with orthorhombic symmetry (space group Imma, cell parameters a = 4.8110(3) angstrom, b = 8.9624(6) angstrom, c = 10.8970(8) angstrom, Z = 4, hydride, T = 298 K). It contains two deuterium sites: one is disordered with an occupancy of 75% and surrounds iridium in a distorted square planar configuration with distances [Ir-D] = 1.69 angstrom; the other is ordered and is coordinated by magnesium in a distorted tetrahedral configuration.

引用

页码：65 / 68

页数：4

共 15 条

[1] TETRAGONAL TRIMAGNESIUM RUTHENIUM TRIDEUTERIDE, MG3RUD3, CONTAINING DINUCLEAR [RU2D6]12- COMPLEX ANIONS [J].