#------------------------------------------------------------------------------
#$Date: 2009-11-18 16:56:34 +0200 (Wed, 18 Nov 2009) $
#$Revision: 858 $
#$URL: file:///home/coder/svn-repositories/cod/cif/9/9000538.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_9000538
loop_
_publ_author_name
'Hazen R M'
_publ_section_title
;
 Effects of temperature and pressure on the crystal structure of forsterite
 T = 1000 C P = 1 atm
 olivine
;
_journal_name_full               'American Mineralogist'
_journal_page_first              1280
_journal_page_last               1293
_journal_volume                  61
_journal_year                    1976
_chemical_formula_sum            'Mg2 O4 Si'
_[local]_cod_chemical_formula_sum_orig 'Si Mg2 O4'
_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                   4.795
_cell_length_b                   10.36
_cell_length_c                   6.06
_cell_volume                     301.038
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
Si 0.42630 0.09430 0.25000
Mg1 0.00000 0.00000 0.00000
Mg2 0.99240 0.27720 0.25000
O1 0.76310 0.09140 0.25000
O2 0.21780 0.44970 0.25000
O3 0.28430 0.16290 0.03590
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 0.00792 0.01468 0.01433 0.00101 0.00000 0.00000
Mg1 0.01794 0.03208 0.01712 -0.00101 -0.00250 -0.00541
Mg2 0.02132 0.02066 0.02270 0.00126 0.00000 0.00000
O1 0.01374 0.02338 0.02009 0.01158 0.00000 0.00000
O2 0.01572 0.01740 0.01972 0.00000 0.00000 0.00000
O3 0.01899 0.02447 0.01916 -0.00075 -0.00074 0.00604