#------------------------------------------------------------------------------
#$Date: 2008-03-10 10:25:41 +0200 (Mon, 10 Mar 2008) $
#$Revision: 255 $
#$URL: file:///home/coder/svn-repositories/cod/cif/9/9000779.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_9000779
loop_
_publ_author_name
'Levien L'
'Prewitt C T'
'Weidner D J'
_publ_section_title
;
 Structure and elastic properties of quartz at pressure
 P = 55.8 kbar
;
_journal_name_full               'American Mineralogist'
_journal_page_first              920
_journal_page_last               930
_journal_volume                  65
_journal_year                    1980
_chemical_formula_sum            'Si O2'
_chemical_name_mineral           Quartz
_symmetry_space_group_name_H-M   'P 32 2 1'
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                120
_cell_length_a                   4.722
_cell_length_b                   4.722
_cell_length_c                   5.267
_cell_volume                     101.706
loop_
_symmetry_equiv_pos_as_xyz
x,y,z
y,x,2/3-z
-y,x-y,2/3+z
-x,-x+y,1/3-z
-x+y,-x,1/3+z
x-y,-y,-z
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
Si 0.45370 0.00000 0.00000
O 0.40470 0.29260 0.09980
loop_
_atom_site_aniso_label
_atom_site_aniso_U_11
_atom_site_aniso_U_22
_atom_site_aniso_U_33
_atom_site_aniso_U_12
_atom_site_aniso_U_13
_atom_site_aniso_U_23
Si 0.00695 0.00627 0.00506 0.00313 -0.00022 -0.00044
O 0.01296 0.00991 0.00871 0.00669 -0.00349 -0.00327