Bulk modulus of anatase

Room-temperature volume versus pressure data of anatase was obtained from X-ray diffraction measurements in a diamond anvil cell up to 7.8 GPa. A fit of the pressure-volume data to a Birch-Murnaghan equation of state with an assumed pressure derivative K' of 4 and a zero-pressure unit cell volume V-0 of 136.74(5) Angstrom (3) yielded an isothermal bulk modulus value for anatase of 178 +/- 1 GPa. (C) 2001 Elsevier Science Ltd. All rights reserved.