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: 6
_database_code_amcsd 0007871
10.2170 7.9579 4.9565 90 90 90 Ima2
atom      x      y      z
Si   .10183 .35660     .5
O1   .57933 .69059 .18477
O2      .75 .92453 .04157
O3        0     .5 .59431