SiO2
Boisen M B, Gibbs G V, Bukowinski M S T
Physics and Chemistry of Minerals 21 (1994) 269-284
Framework silica structures generated using simulated annealing
with a potential energy function based on an H6Si2O7 molecule
Sample: 7
_database_code_amcsd 0007872
7.4953 8.6203 4.7305 90 90 90 C222_1
atom      x      y      z
Si   .19691 .15247 .35535
O1   .31542 .20927 .08746
O2        0 .10526    .25
O3   .71315      0      0