#------------------------------------------------------------------------------
#$Date: 2024-05-02 12:48:35 +0200 (Thu 02 de May de 2024) $
#$Revision: 291455 $
#$URL: svn://www.crystallography.net/cod/cif/9/00/63/9006305.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_9006305
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: 22
;
_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           7
_symmetry_space_group_name_Hall  'P -2yc'
_symmetry_space_group_name_H-M   'P 1 c 1'
_cell_angle_alpha                90
_cell_angle_beta                 119.6668
_cell_angle_gamma                90
_cell_length_a                   4.2166
_cell_length_b                   4.0206
_cell_length_c                   7.6423
_cell_formula_units_Z            4
_cell_volume                     112.579
_exptl_crystal_density_diffrn    3.545
_cod_original_formula_sum        'Si O2'
_cod_database_code               9006305
loop_
_symmetry_equiv_pos_as_xyz
x,y,z
x,-y,1/2+z
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
Si1 0.00000 0.49891 0.00000
Si2 0.30231 0.10448 0.37836
O1 0.34155 0.26088 0.58341
O2 0.68329 0.20774 0.38310
O3 0.13105 0.27048 0.86496
O4 0.98917 0.30762 0.18536
