Cristobalite II
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 = 10.1 GPa
Locality: Ellora Caves, India
_database_code_amcsd 0018351
7.803 4.382 8.366 90 118.7 90 P2_1/c
atom     x     y     z Uiso
Si1  .6258 .2822 .8522 .010
Si2  .8769 .9612 .7287 .008
O1   .8230 .1155 .8780 .020
O2   .6839 .4673 .0384 .010
O3   .4551 .0478 .8067 .018
O4   .0670 .1033 .7402 .027