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 = 9.1 GPa Locality: Ellora Caves, India _database_code_amcsd 0018347 4.599 4.599 6.130 90 90 90 P4_12_12 atom x y z Uiso Si .3396 .3396 0 .014 O .2238 .1800 .2164 .011