Document Type
Article
Publication Date
7-28-2011
Journal or Book Title
Journal of Applied Physics
Volume
110
Issue
2
First Page
023524
DOI
10.1063/1.3610501
Abstract
ilver azide (AgN 3) was compressed up to 51.3 GPa. The results reveal a reversible second-order orthorhombic-to-tetragonal phase transformation starting from ambient pressure and completing at 2.7 GPa. The phase transition is accompanied by a proximity of cell parameters aand b, a 3° rotation of azide anions, and a change of coordination number from 4-4 (four short, four long) to eight fold. The crystal structure of the high pressure phase is determined to be inI4/mcm space group, with Ag at 4a, N1 at 4d, and N2 at 8h Wyckoff positions. Both of the two phases have anisotropic compressibility: the orthorhombic phase exhibits an anomalous expansion under compression along a-axis and is more compressive along b-axis than c-axis; the tetragonal phase is more compressive along the interlayer direction than the intralayer directions. The bulk moduli of the orthorhombic and tetragonal phases are determined to be KOT = 39 ± 5 GPa with KOT’ = 10 ± 7 and KOT = 57 ± 2 GPa with KOT’ = 6.6 ± 0.2, respectively.
Rights
Copyright 2011 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.
Copyright Owner
American Institute of Physics
Copyright Date
2011
Language
en
File Format
application/pdf
Recommended Citation
Hou, Dongbin; Zhang, Fuxiang; Ji, Cheng; Hannon, Trevor; Zhu, Hongyang; Wu, Jianzhe; Levitas, Valery I.; and Ma, Yanzhang, "Phase transition and structure of silver azide at high pressure" (2011). Aerospace Engineering Publications. 28.
https://lib.dr.iastate.edu/aere_pubs/28
Included in
Aerospace Engineering Commons, Materials Science and Engineering Commons, Mechanical Engineering Commons
Comments
The following article appeared in Journal of Applied Physics 110 (2011): 023524 and may be found at http://dx.doi.org/10.1063/1.3610501.