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: 3153c
;
_database_code_amcsd 0007496
_chemical_formula_sum 'Mg1.583 Fe.399 Mn.012 Ca.005 Si O4'
_cell_length_a 4.7687
_cell_length_b 10.2555
_cell_length_c 6.0066
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 293.755
_exptl_crystal_density_diffrn      3.475
_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   0.78300   0.00747
FeM1   0.00000   0.00000   0.00000   0.21700   0.00747
MgM2   0.98900   0.27800   0.25000   0.80000   0.00747
FeM2   0.98900   0.27800   0.25000   0.18200   0.00747
MnM2   0.98900   0.27800   0.25000   0.01200   0.00747
CaM2   0.98900   0.27800   0.25000   0.00500   0.00747
SiT   0.42720   0.09470   0.25000   1.00000   0.00633
O1   0.76590   0.09170   0.25000   1.00000   0.00735
O2   0.21940   0.44840   0.25000   1.00000   0.00760
O3   0.27950   0.16350   0.03380   1.00000   0.00836