High pressure-temperature Brillouin study of liquid water: evidence of the structural transition from low-density water to high-density water.
The structural transformations occurring to water from low-density (LDW) to high-density (HDW) regimes have been studied by Brillouin scattering for the first time at temperatures up to 453 K and at pressures up to the solidification point. At ambient temperature (293 K) a discontinuity in pressure response of the sound velocity is observed. Furthermore, there are evident breaks in the linear behavior of log10 C11 versus log10(rho/rho0) when pressure increases up to 0.29, 0.21, and 0.19 GPa at the temperature of 293, 316, and 353 K, respectively. It is supposed to indicate the structural transition from LDW to HDW, and the possible transition boundary between LDW and HDW is in good agreement with the molecular-dynamics simulation.
Li
Fangfei
F
National Laboratory of Superhard Materials, Jilin University, Changchun 130012, China.
Cui
Qiliang
Q
He
Zhi
Z
Cui
Tian
T
Zhang
Jian
J
Zhou
Qiang
Q
Zou
Guangtian
G
Sasaki
Shigeo
S