Synthesis, crystal structure and magnetism of the mixed metal hydrides Eu1-xSrxMg2H6 (0 ≤ x ≤ 0.6)

被引：16

作者：

Kohlmann, H

Yvon, K

Wang, Y

机构：

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

[2] Univ Saarland, Inst Anorgan & Analyt Chem & Radiochem, Fachrichtung Chem 8 1, D-66041 Saarbrucken, Germany

[3] Univ Geneva, Dept Phys Mat Condensee, CH-1211 Geneva, Switzerland

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2005年 / 393卷 / 1-2期

关键词：

metal hydrides; intermetallics; divalent europium; neutron diffraction; neutron absorption;

D O I：

10.1016/j.jallcom.2004.09.052

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 hydrogenation products of the solid-solution series Eu1-xSrxMg2 (0 <= x <= 1; MgZn2-type structure) have been investigated. At x <= 0.6 red-orange coloured hydrides of composition Eu1-xSrxMg2H6 are formed that crystallize with a disordered EuMg2D6-type structure. For x > 0.8, yellow-grey hydrides of composition (Eu1-xSrx)(2)Mg3H10 and Ba2Ni3H10-type structure are formed. The deuterium distribution was ascertained for Eu0.6Sr0.4Ag2D6 by neutron powder diffraction (space group P4/mmm, a = 377.27(5) pm, c = 799.3(2), Z = 1), thus confirming a slightly elongated but still extremely short Mg-D bond of 179 pm. The hydrides are paramagnetic with magnetic moments close to the free ion value of Eu2+ and order ferromagnetically below T-C = 21 and 15 K for x = 0.2 and 0.4, respectively. (c) 2004 Elsevier B.V. All rights reserved.

引用

页码：11 / 15

页数：5