Pressure-induced phase transition and octahedral tilt system change of Ba2BiSbO6

被引：21
作者：
Lufaso, MW
Macquart, RB
Lee, YJ
Vogt, T
zur Loye, HC
机构：
[1] Univ S Carolina, Dept Chem & Biochem, Columbia, SC 29208 USA
[2] Yonsei Univ, Dept Earth Syst Sci, Seoul 120749, South Korea
来源：
JOURNAL OF SOLID STATE CHEMISTRY | 2006年 / 179卷 / 03期
基金：
美国国家科学基金会;
关键词：
high pressure; phase transition; double perovskite;
D O I：
10.1016/j.jssc.2005.12.024
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
High-resolution X-ray synchrotron powder diffraction studies under high-pressure conditions are reported for the ordered double perovskite Ba2BiSbO6. Near 4 GPa, the oxide undergoes a pressure-induced phase transition. The symmetry of the material changes during the phase transition from space group R (3) over bar to space group I2/m, which is consistent with a change in the octahedral tilting distortion from an a(-)a(-)a(-) type to a(o)b(-)b(-) type using the Glazer notation. A fit of the volume-pressure data using the Birch-Murnagaham equation of state yielded a bulk modulus of 144(8) GPa for the rhombohedral phase. (C) 2005 Elsevier Inc. All rights reserved.
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页码：917 / 922
页数：6
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