data_global
_chemical_name_mineral 'Forsterite'
loop_
_publ_author_name
'Miyake M'
'Nakamura H'
'Kojima H'
'Marumo F'
_journal_name_full 'American Mineralogist'
_journal_volume 72 
_journal_year 1987
_journal_page_first 594
_journal_page_last 598
_publ_section_title
;
 Cation ordering in Co-Mg olivine solid-solution series
 Sample: Co03
;
_database_code_amcsd 0001086
_chemical_formula_sum '(Co.261 Mg1.739) Si O4'
_cell_length_a 4.760
_cell_length_b 10.221
_cell_length_c 5.984
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 291.133
_exptl_crystal_density_diffrn      3.416
_symmetry_space_group_name_H-M 'P b n m'
loop_
_space_group_symop_operation_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
Co1   0.00000   0.00000   0.00000   0.20800
Mg1   0.00000   0.00000   0.00000   0.79200
Co2   0.99130   0.27710   0.25000   0.05300
Mg2   0.99130   0.27710   0.25000   0.94700
Si   0.42670   0.09420   0.25000   1.00000
O1   0.76600   0.09200   0.25000   1.00000
O2   0.22000   0.44700   0.25000   1.00000
O3   0.27830   0.16330   0.03310   1.00000
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
Co1 0.00320 0.00740 0.00600 0.00010 -0.00060 -0.00080
Mg1 0.00320 0.00740 0.00600 0.00010 -0.00060 -0.00080
Co2 0.00390 0.00520 0.00630 0.00030 0.00000 0.00000
Mg2 0.00390 0.00520 0.00630 0.00030 0.00000 0.00000
Si 0.00210 0.00560 0.00530 0.00020 0.00000 0.00000
O1 0.00270 0.00690 0.00650 -0.00010 0.00000 0.00000
O2 0.00360 0.00600 0.00740 -0.00010 0.00000 0.00000
O3 0.00430 0.00720 0.00720 0.00030 -0.00060 0.00180