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: 2
_database_code_amcsd 0007867
4.7481 4.7481 7.4880 90 90 90 I-42d
atom      x      y      z
Si       .5     .5     .5
O       .25 .62338   .375