#------------------------------------------------------------------------------
#$Date: 2009-11-20 13:07:27 +0200 (Fri, 20 Nov 2009) $
#$Revision: 893 $
#$URL: file:///home/coder/svn-repositories/cod/cif/9/9000321.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_9000321
loop_
_publ_author_name
'Smyth J R'
'Hazen R M'
_publ_section_title
;
 The crystal structures of forsterite and hortonolite at several temperatures
 up to 900 C
 T = 600 C
;
_journal_name_full               'American Mineralogist'
_journal_page_first              588
_journal_page_last               593
_journal_volume                  58
_journal_year                    1973
_chemical_formula_sum            'Mg2 O4 Si'
_chemical_name_mineral           Forsterite
_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                   4.778
_cell_length_b                   10.290
_cell_length_c                   6.017
_cell_volume                     295.830
_diffrn_ambient_temperature      873.15
_[local]_cod_chemical_formula_sum_orig 'Mg2 Si O4'
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_U_iso_or_equiv
Mg1 0.00000 0.00000 0.00000 0.01482
Mg2 0.99190 0.27850 0.25000 0.01444
Si 0.42570 0.09410 0.25000 0.00773
O1 0.76370 0.09060 0.25000 0.01393
O2 0.21780 0.44970 0.25000 0.01203
O3 0.28220 0.16190 0.03520 0.01393