Physical Review B, volume 84, issue 6, publication number 064127

Series of Phase Transitions in Cesium Azide Under High Pressure Studied by in situ X-ray Diffraction

Dongbin Hou 1
Fuxiang Zhang 2
Cheng Ji 1
Trevor Hannon 1
Hongyang Zhu 1
Jianzhe Wu 1
Yanzhang Ma 1
Publication typeJournal Article
Publication date2011-08-30
Quartile SCImago
Q1
Quartile WOS
Q2
Impact factor3.7
ISSN24699950, 24699969, 10980121, 1550235X
Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Abstract
In situ x-ray diffraction measurements of cesium azide (CsN{sub 3}) were performed at high pressures of up to 55.4 GPa at room temperature. Three phase transitions were revealed as follows: tetragonal (I4/mcm, Phase II) {yields} monoclinic (C2/m, Phase III) {yields} monoclinic (P2{sub 1}/m or P2{sub 1}, Phase IV) {yields} triclinic (P1 or P1{sup -}, Phase V), at 0.5, 4.4, and 15.4 GPa, respectively. During the II-III phase transition, CsN{sub 3} keeps its layered structure and the azide anions rotate obviously. The compressibility of Phase II is dominated by the repulsions between azide anions. The deformation of unit cell is isotropic in Phases II and IV and anisotropic in Phase III. With increasing pressures, the monoclinic angle increases in Phase III and then becomes stable in Phase IV. The bulk moduli of Phases II, III, IV, and V are determined to be 18 {+-} 4, 20 {+-} 1, 27 {+-} 1 and 34 {+-} 1 GPa, respectively. The ionic character of alkali azides is found to play a key role in their pressure-induced phase transitions.

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Hou D. et al. Series of Phase Transitions in Cesium Azide Under High Pressure Studied by in situ X-ray Diffraction // Physical Review B. 2011. Vol. 84. No. 6. 064127
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Hou D., Zhang F., Ji C., Hannon T., Zhu H., Wu J., Ma Y. Series of Phase Transitions in Cesium Azide Under High Pressure Studied by in situ X-ray Diffraction // Physical Review B. 2011. Vol. 84. No. 6. 064127
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RIS Copy
TY - JOUR
DO - 10.1103/PhysRevB.84.064127
UR - https://doi.org/10.1103/PhysRevB.84.064127
TI - Series of Phase Transitions in Cesium Azide Under High Pressure Studied by in situ X-ray Diffraction
T2 - Physical Review B
AU - Hou, Dongbin
AU - Zhang, Fuxiang
AU - Ji, Cheng
AU - Hannon, Trevor
AU - Zhu, Hongyang
AU - Wu, Jianzhe
AU - Ma, Yanzhang
PY - 2011
DA - 2011/08/30 00:00:00
PB - American Physical Society (APS)
IS - 6
VL - 84
SN - 2469-9950
SN - 2469-9969
SN - 1098-0121
SN - 1550-235X
ER -
BibTex
Cite this
BibTex Copy
@article{2011_Hou,
author = {Dongbin Hou and Fuxiang Zhang and Cheng Ji and Trevor Hannon and Hongyang Zhu and Jianzhe Wu and Yanzhang Ma},
title = {Series of Phase Transitions in Cesium Azide Under High Pressure Studied by in situ X-ray Diffraction},
journal = {Physical Review B},
year = {2011},
volume = {84},
publisher = {American Physical Society (APS)},
month = {aug},
url = {https://doi.org/10.1103/PhysRevB.84.064127},
number = {6},
doi = {10.1103/PhysRevB.84.064127}
}
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