Cristobalite Downs R T, Palmer D C American Mineralogist 79 (1994) 9-14 The pressure behavior of alpha cristobalite P = 0.19 GPa Locality: Ellora Caves, India _database_code_amcsd 0001630 4.9501 4.9501 6.8760 90 90 90 P4_12_12 atom x y z Biso Si .3027 .3027 0 .80 O .2388 .1086 .1817 1.22