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.
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页码：466 / 468
页数：3
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