#------------------------------------------------------------------------------
#$Date: 2024-05-02 12:48:35 +0200 (Thu 02 de May de 2024) $
#$Revision: 291455 $
#$URL: svn://www.crystallography.net/cod/cif/9/00/62/9006294.cif $
#------------------------------------------------------------------------------
#
# This file is available in the Crystallography Open Database (COD),
# http://www.crystallography.net/. The original data for this entry
# were provided the American Mineralogist Crystal Structure Database,
# http://rruff.geo.arizona.edu/AMS/amcsd.php
#
# The file may be used within the scientific community so long as
# proper attribution is given to the journal article from which the
# data were obtained.
#
data_9006294
loop_
_publ_author_name
'Boisen, M. B.'
'Gibbs, G. V.'
'Bukowinski, M. S. T.'
_publ_section_title
;
 Framework silica structures generated using simulated annealing
 with a potential energy function based on an H6Si2O7 molecule
 Sample: 11
;
_journal_name_full               'Physics and Chemistry of Minerals'
_journal_page_first              269
_journal_page_last               284
_journal_volume                  21
_journal_year                    1994
_chemical_formula_structural     SiO2
_chemical_formula_sum            'O2 Si'
_space_group_IT_number           5
_symmetry_space_group_name_Hall  'C 2y'
_symmetry_space_group_name_H-M   'C 1 2 1'
_cell_angle_alpha                90
_cell_angle_beta                 114.9303
_cell_angle_gamma                90
_cell_length_a                   6.9979
_cell_length_b                   8.2122
_cell_length_c                   6.5106
_cell_formula_units_Z            8
_cell_volume                     339.289
_exptl_crystal_density_diffrn    2.353
_cod_original_formula_sum        'Si O2'
_cod_database_code               9006294
loop_
_symmetry_equiv_pos_as_xyz
x,y,z
1/2+x,1/2+y,z
-x,y,-z
1/2-x,1/2+y,-z
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
Si1 0.20423 0.00000 0.21347
Si2 0.39511 0.81983 0.64098
O1 0.50000 0.71754 0.50000
O2 0.00000 0.93053 0.00000
O3 0.79134 0.92676 0.55053
O4 0.41950 0.94158 0.19267
O5 0.80752 0.19767 0.77866
