data_global
_chemical_name_mineral 'Forsterite'
loop_
_publ_author_name
'Bostrom D'
_journal_name_full 'American Mineralogist'
_journal_volume 72 
_journal_year 1987
_journal_page_first 965
_journal_page_last 972
_publ_section_title
;
 Single-crystal X-ray diffraction studies of synthetic Ni-Mg olivine solid
 solutions
 Sample: XNi2+ = 0.00
;
_database_code_amcsd 0001118
_chemical_formula_sum 'Mg2 Si O4'
_cell_length_a 4.749
_cell_length_b 10.1985
_cell_length_c 5.9792
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 289.589
_exptl_crystal_density_diffrn      3.227
_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
Mg1   0.00000   0.00000   0.00000
Mg2   0.99130   0.27730   0.25000
Si   0.42610   0.09400   0.25000
O1   0.76580   0.09190   0.25000
O2   0.22100   0.44700   0.25000
O3   0.27740   0.16300   0.03290
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
Mg1 0.01977 0.04110 0.02300 -0.00172 -0.00676 -0.01081
Mg2 0.06924 0.06270 0.06248 -0.00098 0.00000 0.00000
Si 0.03850 0.05480 0.04872 0.00098 0.00000 0.00000
O1 0.04536 0.07535 0.07064 -0.00196 0.00000 0.00000
O2 0.06056 0.05322 0.07317 0.00294 0.00000 0.00000
O3 0.05804 0.07798 0.06212 0.00712 0.00000 0.01637