"T. Uchino,A. Sakoh,M. Azuma,M. Takano,M. Takahashi,T. Yoko","A Novel Pressure-Induced Polymorphic Transition from Fumed Silica to Transparent Amorphous SiO2 at Room Temperature",,"J. Phys.: Condens. Matter",,"Vol. 14","No. 44","pp. 11111-11114",2002,