Neutron powder diffraction study of (ND4)2SeCl6 under high pressure

被引：2

作者：

Yamamuro, O

Okishiro, K

Matsuo, T

Ohta, T

Kume, Y

Ibberson, RM

机构：

[1] Osaka Univ, Grad Sch Sci, Dept Chem, Toyonaka, Osaka 560, Japan

[2] Natl Inst Res Inorgan Mat, Tsukuba, Ibaraki 305, Japan

[3] Azabu Univ, Dept Basic Sci, Sagamihara, Kanagawa 229, Japan

[4] Rutherford Appleton Lab, ISIS Sci Div, Didcot OX11 0QX, Oxon, England

来源：

PHYSICA B | 1997年 / 241卷

关键词：

neutron powder diffraction; phase transition; orientational disorder; isotope effect;

D O I：

10.1016/S0921-4526(97)00621-2

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The phase transition (T-trs = 48 K) of (ND4)(2)SeCl6, which exhibits a strong isotope effect, has been studied by neutron powder diffraction under high pressure. Data of the high-temperature phase were collected on HRPD at ISIS under helium gas pressure of 480 MPa at 63 K. The Rietveld analysis and Fourier contour map revealed that the D atom of the ND4+ ion is broadly disordered around the C-3-axis of the cubic lattice at lower pressure and tends to be localized on the axis at higher pressure. (C) 1998 Published by Elsevier Science B.V. All rights reserved.

引用

页码：466 / 468

页数：3

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