Structure and dynamics of ammonium halides under high pressure

被引：6
|
作者：
Kozlenko, DP [1 ]
Savenko, BN
Glazkov, VP
Somenkov, VA
Hull, S
机构：
[1] Joint Inst Nucl Res, Frank Lab Neutron Phys, Dubna 141980, Moscow Region, Russia
[2] IV Kurchatov Atom Energy Inst, Russian Sci Ctr, Moscow 123182, Russia
[3] Rutherford Appleton Lab, ISIS Facil, Didcot OX11 0QX, Oxon, England
来源：
PHYSICA B-CONDENSED MATTER | 2000年 / 276卷
基金：
俄罗斯基础研究基金会;
关键词：
crystal structures; lattice dynamics; high pressure;
D O I：
10.1016/S0921-4526(99)01418-0
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
The structures of ammonium halides ND4I and ND4Br have been studied by means of neutron diffraction at pressures up to 9 GPa. We found that the high-pressure phase V of ammonium halides has the same structure as the low-temperature phase III-tetragonal one with antiparallel ordering of ammonium ions. Vibrational spectra of NH4I have been studied at pressures up to 5 GPa. Libration and transverse optical mode frequencies as functions of pressure were obtained. (C) 2000 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：226 / 227
页数：2
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