Abstract
The behaviour upon compression of fluorite, CaF2, has been determined to pressures of 9 GPa at room temperature by single-crystal X-ray diffraction. The room temperature isothermal bulk modulus, KT, is 81.0+or-1.2 GPa, and K'=5.22+or-0.35. These data are combined with other thermodynamic data to provide a high-pressure, high-temperature equation of state for fluorite.