data_global
_chemical_name_mineral 'Forsterite'
loop_
_publ_author_name
'Ottonello G'
'Princivalle F'
'Della Giusta A'
_journal_name_full 'Physics and Chemistry of Minerals'
_journal_volume 17 
_journal_year 1990
_journal_page_first 301
_journal_page_last 312
_publ_section_title
;
 Temperature, composition, and fO2 effects on intersite
 distribution of Mg and Fe2+ in olivines
 Sample: 3149c
;
_database_code_amcsd 0007492
_chemical_formula_sum 'Mg1.139 Fe.825 Mn.03 Ca.006 Si O4'
_cell_length_a 4.7911
_cell_length_b 10.3316
_cell_length_c 6.0350
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 298.731
_exptl_crystal_density_diffrn      3.729
_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
_atom_site_U_iso_or_equiv
MgM1   0.00000   0.00000   0.00000   0.54700   0.00899
FeM1   0.00000   0.00000   0.00000   0.45300   0.00899
MgM2   0.98720   0.27860   0.25000   0.59200   0.00874
FeM2   0.98720   0.27860   0.25000   0.37200   0.00874
MnM2   0.98720   0.27860   0.25000   0.03000   0.00874
CaM2   0.98720   0.27860   0.25000   0.00600   0.00874
SiT   0.42810   0.09560   0.25000   1.00000   0.00785
O1   0.76600   0.09200   0.25000   1.00000   0.00950
O2   0.21540   0.45010   0.25000   1.00000   0.01001
O3   0.28160   0.16400   0.03470   1.00000   0.01001