#------------------------------------------------------------------------------
#$Date: 2008-03-10 10:25:41 +0200 (Mon, 10 Mar 2008) $
#$Revision: 255 $
#$URL: file:///home/coder/svn-repositories/cod/cif/9/9001793.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_9001793
loop_
_publ_author_name
'Chen J'
'Li R'
'Parise J B'
'Weidner D J'
_publ_section_title
;
 Pressure-induced ordering in (Ni,Mg)2SiO4 olivine
 Sample: 4 GPa and 800 C, 109 min
;
_journal_name_full               'American Mineralogist'
_journal_page_first              1519
_journal_page_last               1522
_journal_volume                  81
_journal_year                    1996
_chemical_formula_sum            '(Ni Mg) Si O4'
_chemical_name_mineral           Liebenbergite
_symmetry_space_group_name_H-M   'P b n m'
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_length_a                   4.7322
_cell_length_b                   10.1453
_cell_length_c                   5.9309
_cell_volume                     284.740
loop_
_symmetry_equiv_pos_as_xyz
x,y,z
x,y,1/2-z
-x,-y,1/2+z
1/2+x,1/2-y,1/2+z
1/2-x,1/2+y,1/2-z
1/2-x,1/2+y,z
1/2+x,1/2-y,-z
-x,-y,-z
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
_atom_site_U_iso_or_equiv
Ni1 0.00000 0.00000 0.00000 0.76200 0.01600
Mg1 0.00000 0.00000 0.00000 0.23800 0.01600
Ni2 0.98920 0.27620 0.25000 0.23800 0.01600
Mg2 0.98920 0.27620 0.25000 0.76200 0.01600
Si 0.42600 0.09390 0.25000 1.00000 0.01700
O1 0.76870 0.08900 0.25000 1.00000 0.01000
O2 0.22590 0.44500 0.25000 1.00000 0.01000
O3 0.28040 0.16260 0.03260 1.00000 0.01000