title: The velocity, refractive index, and equation of state of liquid ammonia at high temperatures and high pressures.
abstract: The high temperature and high pressure Brillouin scattering studies of liquid ammonia have been performed in a diamond anvil cell. Acoustic velocity, refractive index, adiabatic bulk modulus, and the equation of state of liquid ammonia were determined at temperatures up to 410 K and at pressures up to the solidification point. Velocity and refractive index increase smoothly with increasing pressure along isothermals but decrease slightly with the temperature increase. The bulk modulus increases linearly with pressure and its slope dB/dP decreases slightly with increasing temperature from 6.67 at 297 K to 5.94 at 410 K.
authors.affiliation: State Key Lab of Superhard Materials, Jilin University, Changchun 130012, China.
authors.forename: Fangfei
authors.initials: F
authors.lastname: Li
authors.forename: Min
authors.initials: M
authors.lastname: Li
authors.forename: Qiliang
authors.initials: Q
authors.lastname: Cui
authors.forename: Tian
authors.initials: T
authors.lastname: Cui
authors.forename: Zhi
authors.initials: Z
authors.lastname: He
authors.forename: Qiang
authors.initials: Q
authors.lastname: Zhou
authors.forename: Guangtian
authors.initials: G
authors.lastname: Zou