data_global
_amcsd_formula_title 'SiO2'
loop_
_publ_author_name
'Boisen M B'
'Gibbs G V'
'Bukowinski M S T'
_journal_name_full 'Physics and Chemistry of Minerals'
_journal_volume 21 
_journal_year 1994
_journal_page_first 269
_journal_page_last 284
_publ_section_title
;
 Framework silica structures generated using simulated annealing
 with a potential energy function based on an H6Si2O7 molecule
 Sample: 14
;
_database_code_amcsd 0007879
_chemical_formula_sum 'Si O2'
_cell_length_a 5.8657
_cell_length_b 5.1519
_cell_length_c 5.3377
_cell_angle_alpha 92.6936
_cell_angle_beta 90.7338
_cell_angle_gamma 90.0688
_cell_volume 161.111
_exptl_crystal_density_diffrn      2.477
_symmetry_space_group_name_H-M 'P 1'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
Si1   0.09993   0.21417   0.23644
Si2   0.84312   0.85110   0.49421
Si3   0.10030   0.47770   0.74039
Si4   0.53953   0.35064   0.49265
O1   0.00245   0.33899   0.98339
O2   0.68637   0.59987   0.40748
O3   0.99205   0.35273   0.48362
O4   0.37609   0.24120   0.26115
O5   0.37645   0.45195   0.72274
O6   0.00933   0.77384   0.72822
O7   0.00859   0.91962   0.26120
O8   0.69721   0.10951   0.57922