Cristobalite Dera P, Lazarz J D, Prakapenka V B, Barkley M, Downs R T Physics and Chemistry of Minerals 38 (2011) 517-529 New insights into the high-pressure polymorphism of SiO2 cristobalite Note: P = 0.2 GPa Locality: Ellora Caves, India _database_code_amcsd 0018342 4.9501 4.9501 6.9259 90 90 90 P4_12_12 atom x y z Uiso Si .3027 .3027 0 .0101 O .2388 .1086 .1817 .015