科学通报（英文版）
科學通報（英文版）
과학통보（영문판）
CHINESE SCIENCE BULLETIN
2007年
12期
1600-1606
,共7页
single-crystal gold%ultrasonic measurement%high pressure%hydrostatic condition%elasticity
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 tudy.The three independent elastic constants of gold at ambient condition were determined to be C11=192.7 GPa,C12=162.9 GPa,and C44=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(KTO)and its pressure derivatives(K'TO)are KTO=166.44 GPa and K'TO=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 f state of gold proposed previously.
