TY - JOUR
T1 - Pressure-induced series of phase transitions in sodium azide
AU - Zhu, Hongyang
AU - Zhang, Fuxiang
AU - Ji, Cheng
AU - Hou, Dongbin
AU - Wu, Jianzhe
AU - Hannon, Trevor
AU - Ma, Yangzhang
N1 - Funding Information:
The authors thank Boheng Ma and Fowler Tasha for proofreading the manuscript and Zhongwu Wang (CHESS) and Zhiqiang Chen (X17C) for technical support. This work was supported by the Defense Threat Reduction Agency (HDTRA1–09–0034) and based upon research conducted at the Cornell High Energy Synchrotron Source (CHESS), which was supported by the National Science Foundation and the National Institute of Health/National Institute of General Medical Science under NSF Award DMR-0936384.
PY - 2013/1/21
Y1 - 2013/1/21
N2 - The phase analysis of sodium azide (NaN3) has been investigated by in situ synchrotron X-ray diffraction measurements in a diamond anvil cell up to 52.0 GPa at room temperature. Three pressure-induced phase transitions were observed. The phase transition pressures were determined to be 0.3, 17.3, and 28.7 GPa verified by three different pressure transmitting media. The first high pressure phase, α-NaN3 (0.3 ∼ 17.3 GPa), was identified to be monoclinic with a C2/m space group. The β-NaN3 to α-NaN3 transition is a second-order phase transition, accompanied by the shearing of the Na-layers and the tilting of the azide chains. The second high pressure phase, γ-NaN3 (18.4 ∼ 28.7 GPa), has a lower symmetry than the α-NaN3. A further phase transition of γ-NaN3 to δ-NaN3 at 28.7 GPa was observed.
AB - The phase analysis of sodium azide (NaN3) has been investigated by in situ synchrotron X-ray diffraction measurements in a diamond anvil cell up to 52.0 GPa at room temperature. Three pressure-induced phase transitions were observed. The phase transition pressures were determined to be 0.3, 17.3, and 28.7 GPa verified by three different pressure transmitting media. The first high pressure phase, α-NaN3 (0.3 ∼ 17.3 GPa), was identified to be monoclinic with a C2/m space group. The β-NaN3 to α-NaN3 transition is a second-order phase transition, accompanied by the shearing of the Na-layers and the tilting of the azide chains. The second high pressure phase, γ-NaN3 (18.4 ∼ 28.7 GPa), has a lower symmetry than the α-NaN3. A further phase transition of γ-NaN3 to δ-NaN3 at 28.7 GPa was observed.
UR - http://www.scopus.com/inward/record.url?scp=84872849080&partnerID=8YFLogxK
U2 - 10.1063/1.4776235
DO - 10.1063/1.4776235
M3 - Article
AN - SCOPUS:84872849080
SN - 0021-8979
VL - 113
JO - Journal of Applied Physics
JF - Journal of Applied Physics
IS - 3
M1 - 033511
ER -