AM_Cristobalite_12 Formula: Si O2 Name: Cristobalite Unit cell: 7.166 7.166 7.166 90.0 90.0 90.0 , V=367.99 Space group: FD3M (227)

Peacor D R , Zeitschrift fur Kristallographie , 138 (1973) p.274-298, High-temperature single-crystal study of the cristobalite inversion, Sample: T = 221 C, Locality: Ellora Caves, Hyderabad State, India