Abstract
Ultrasonic measurements were conducted on single-crystal gold at ambient condition and hydrostatic pressures up to 8 GPa at room temperature in a Kawai-type multi-anvil apparatus. The P-wave velocities measured at high pressures were in good agreement with Daniels and Smith's ultrasonic study. The three independent elastic constants of gold at ambient condition were determined to be C 11=192.7 GPa, C 12=162.9 GPa, and C 44=42.4 GPa. On the basis of an analysis of previous elastic data and the present ultrasonic data, the pressure derivatives of three elastic constants were estimated to be C11 = 7.12, C12 = 6.24, and C44 = 1.82. The calculated values of isothermal bulk modulus (K T0) and its pressure derivatives (K′T0) are K T0 = 166.44 GPa and K′T0 = 6.56. This indicates that Anderson et al.'s model of equation of state of gold might underestimates pressure about 1 GPa at pressure around 23 GPa and ambient temperature. Our results explained the discrepancies among the models of equation of state of gold proposed previously.
Original language | English |
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Pages (from-to) | 1600-1606 |
Number of pages | 7 |
Journal | Chinese Science Bulletin |
Volume | 52 |
Issue number | 12 |
DOIs | |
Publication status | Published - Jun 2007 |
Externally published | Yes |
Keywords
- Elasticity
- High pressure
- Hydrostatic condition
- Single-crystal gold
- Ultrasonic measurement
ASJC Scopus subject areas
- General