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Outline
The knowledge of the thermodynamic equation of state of fluid water plays an important role in understanding of many phenomena within the purview of the earth and planetary sciences. However, data are sparse in the high temperature and high pressure region and most equations of state for water, at high pressures, rely heavily on extrapolation of data or calculations of molecular dynamics. This paper presents the acoustic velocity of water measured by Brillouin scattering technique at different temperature and pressure, and compares the velocity with those predicted by the equations of state. Our measured velocities of water are lower than those predicted by Saul and IAPWS-95, while they are the same as those predicted by Abramson within 6.0 GPa and 673 K; on the other hand, at 21 GPa and 890~1 100 K conditions, the measured velocities are higher than those predicted by all the three equations of state.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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