AM_SiO2_9 Formula: Si O2 Name: SiO2 Unit cell: 4.8452 6.9852 7.0237 113.811 77.951 76.701 , V=199.13 Space group: P1 (1)

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: 10