Elastic properties study of single crystal NH3 up to 26 GPa (pages 526–531)
Fangfei Li, Defang Duan, Min Li, Chunli Ma, Qiliang Cui, Tian Cui, Qiang Zhou, Xiaodong Li, Yanchun Li, Jing Liu and Guangtian Zou
Version of Record online: 27 OCT 2011 | DOI: 10.1002/jrs.3068
Single crystal Brillouin and Raman scattering measurements on NH3 in a diamond anvil cell have been performed under pressures up to 26 GPa at room temperature. The pressure dependencies of acoustic velocity, adiabatic elastic constants, and bulk moduli of ammonia from liquid to solid III and solid IV phase have been determined. In Raman spectra the very weak bending modes ν2 and ν4 for orthorhombic ammonia are both observed at room temperature. Both Brillouin and Raman spectra reflect a possible isostructural phase transition near 12 GPa, which is consistent with early X-ray diffraction studies.