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: Co05
;
_database_code_amcsd 0001087
_chemical_formula_sum '(Co.401 Mg1.599) Si O4'
_cell_length_a 4.765
_cell_length_b 10.225
_cell_length_c 5.986
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 291.651
_exptl_crystal_density_diffrn      3.520
_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   0.31600
Mg1   0.00000   0.00000   0.00000   0.68400
Co2   0.99110   0.27700   0.25000   0.08500
Mg2   0.99110   0.27700   0.25000   0.91500
Si   0.42680   0.09440   0.25000   1.00000
O1   0.76660   0.09230   0.25000   1.00000
O2   0.21860   0.44750   0.25000   1.00000
O3   0.27870   0.16350   0.03340   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 0.00400 0.00630 0.00450 -0.00020 -0.00050 -0.00110
Mg1 0.00400 0.00630 0.00450 -0.00020 -0.00050 -0.00110
Co2 0.00490 0.00420 0.00540 0.00030 0.00000 0.00000
Mg2 0.00490 0.00420 0.00540 0.00030 0.00000 0.00000
Si 0.00290 0.00410 0.00430 0.00010 0.00000 0.00000
O1 0.00330 0.00720 0.00580 0.00050 0.00000 0.00000
O2 0.00530 0.00440 0.00670 0.00010 0.00000 0.00000
O3 0.00510 0.00680 0.00520 0.00040 -0.00020 0.00160