Structural properties of ammonium iodide under high pressure

被引：10

作者：

Huang, Yanping ^{[1
]}

Huang, Xiaoli ^{[1
]}

Wang, Lu ^{[1
]}

Wu, Gang ^{[1
]}

Duan, Defang ^{[1
]}

Bao, Kuo ^{[1
]}

Zhou, Qiang ^{[1
]}

Liu, Bingbing ^{[1
]}

Cui, Tian ^{[1
]}

机构：

[1] Jilin Univ, Coll Phys, State Key Lab Superhard Mat, Changchun 130012, Peoples R China

来源：

RSC ADVANCES | 2015年 / 5卷 / 50期

基金：

中国国家自然科学基金;

关键词：

PHASE-DIAGRAM; NEUTRON; NH4I; DIFFRACTION; SPECTROSCOPY;

D O I：

10.1039/c5ra04211a

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The high-pressure behavior of ammonium iodide (NH4I) has been investigated by in situ synchrotron X-ray diffraction (XRD) and Raman scattering up to 40 GPa. The first-order phase transition from phase IV to V is confirmed by XRD measurements for the first time. Fitting the measured volumetric compression data to the third order Birch-Murnaghan equation of state reveals bulk moduli of B-0 = 14.3 +/- 1.3 and 28.5 +/- 2.6 GPa (with fixed B'(0) = 4) for phases IV and V, respectively. Still, by analyzing the red shift of the N-H symmetric and asymmetric modes and the intramolecular distances, it is concluded that hydrogen bonding is the dominant effect upon compression over the whole pressure range.

引用

页码：40336 / 40340

页数：5

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