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 = 7.3 GPa Locality: Ellora Caves, India _database_code_amcsd 0018346 4.632 4.632 6.209 90 90 90 P4_12_12 atom x y z Uiso Si .3353 .3353 0 .007 O .2276 .1768 .2228 .008