Compressibility and phase transition of δ-UO3 under high pressure

被引：7
|
作者：
Dyuzheva, TI [1 ]
Bendeliani, NA
Brazhkin, VV
Kuznetshov, LM
机构：
[1] RAS, Inst High Pressure Phys, Troitsk 142190, Moskovskaya Obl, Russia
[2] RAS, VI Vernadskii Inst Geochem & Analyt Chem, Moscow 117975, Russia
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2001年 / 315卷 / 1-2期
关键词：
delta-UO3; phase; a-UO3; compressibility; phase transition; high pressure;
D O I：
10.1016/S0925-8388(00)01280-9
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：
A compressibility collapse transition of delta -UO3 (ReO3 structure type) was detected at 0.3 GPa and room temperature using X-ray diffraction in a diamond anvil cell. The compressibility of UO3 increased from 6.3X10(-1) to 9.3x10(-2) GPa(-1) at the transition point. The p-V relationship up to 2.2 GPa is presented. An amorphisation was observed at 2.2 GPa. The investigation of bulk amorphous samples obtained under high pressure at room temperature showed that the amorphisation is connected with the kinetics of the alpha -to-beta UO3 phase transformation. (C) 2001 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：59 / 61
页数：3
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