AM_SiO2_1 Formula: Si O2 Name: SiO2 Unit cell: 4.7481 4.7481 7.488 90.0 90.0 90.0 , V=168.81 Space group: I-42D (122)

Boisen M B , Gibbs G V , Bukowinski M S T , Physics and Chemistry of Minerals , 21 (1994) p.269-284, Framework silica structures generated using simulated annealing, with a potential energy function based on an H6Si2O7 molecule, Sample: 2