NEW IRON(II) COMPLEX METAL-HYDRIDES WITH SRMG2FEH8 TYPE-STRUCTURE

被引：24

作者：

HUANG, B

YVON, K

FISCHER, P

机构：

[1] ETH ZURICH,NEUTRONENSTREUUNG LAB,CH-5232 VILLIGEN PSI,SWITZERLAND

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

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 1995年 / 227卷 / 02期

关键词：

QUATERNARY METAL HYDRIDES; NEUTRON POWDER DIFFRACTION; TRANSITION METAL HYDRIDE COMPLEXES; COMPLEX METAL HYDRIDES;

D O I：

10.1016/0925-8388(95)01648-1

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：

BaMg2FeH8 and EuMg2FeH8 were prepared by sintering mixtures of BaMg2 (EuMg2) alloys and Fe at 780-790 K and 120-155 bar hydrogen (deuterium) pressure in a LiH flux. They crystallize with the trigonal SrMg2FeH8 structure type, space group P (3) over bar m1; BaMg2FeH8: a = 4.5775(3) Angstrom, c = 6.9263(7) Angstrom; EuMg2FeH8: a = 4.5078(1) Angstrom, c = 6.5182(2) Angstrom. Neutron powder diffraction on the deuteride BaMg2FeD8 (a = 4.5683(4) Angstrom, c = 6.9163(3) Angstrom) yields the bond distances [Fe-6D1] = 1.577(3) Angstrom for the octahedral [FeD6](4-) complex, and [D2-3Ba] = 1.742(2) Angstrom and [D2-Mg] = 1.916(8) Angstrom for the tetrahedrally coordinated deuterium anions.

引用

页码：121 / 124

页数：4

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