#------------------------------------------------------------------------------
#$Date: 2008-03-10 10:25:41 +0200 (Mon, 10 Mar 2008) $
#$Revision: 255 $
#$URL: file:///home/coder/svn-repositories/cod/cif/9/9009238.cif $
#------------------------------------------------------------------------------
#
# This file is available in the Crystallography Open Database (COD),
# http://www.crystallography.net/
#
# All data on this site have been placed in the public domain by the
# contributors.
#
data_9009238
loop_
_publ_author_name
'Haines J'
'Leger J M'
'Gorelli F'
'Hanfland M'
_publ_section_title
;
 Crystalline post-quartz phase in silica at high pressure
 Sample at ambient conditions
;
_journal_name_full               'Physical Review Letters'
_journal_page_first              155503
_journal_page_last               155503
_journal_volume                  87
_journal_year                    2001
_chemical_formula_sum            'Si O2'
_chemical_name_mineral           SiO2
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_cell_angle_alpha                90
_cell_angle_beta                 117.9
_cell_angle_gamma                90
_cell_length_a                   7.66
_cell_length_b                   4.10
_cell_length_c                   5.03
_cell_volume                     139.610
loop_
_symmetry_equiv_pos_as_xyz
x,y,z
x,1/2-y,1/2+z
-x,1/2+y,1/2-z
-x,-y,-z
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
Si1 0.50000 0.00000 0.00000
Si2 0.16600 0.50090 0.96880
O1 0.05350 0.24290 0.65110
O2 0.72080 0.24180 0.18640
O3 0.38730 0.23730 0.65970