data_global
_chemical_name_mineral 'Fayalite'
loop_
_publ_author_name
'Hazen R M'
_journal_name_full 'American Mineralogist'
_journal_volume 62 
_journal_year 1977
_journal_page_first 286
_journal_page_last 295
_publ_section_title
;
 Effects of temperature and pressure on the crystal structure of ferromagnesian
 olivine
 T = 23 deg C, P = 31 kb
;
_database_code_amcsd 0000568
_chemical_compound_source 'Synthetic'
_chemical_formula_sum 'Fe2 Si O4'
_cell_length_a 4.802
_cell_length_b 10.260
_cell_length_c 6.070
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 299.060
_exptl_crystal_density_diffrn      4.526
_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_U_iso_or_equiv
Fe1   0.00000   0.00000   0.00000   0.00380
Fe2   0.98700   0.28400   0.25000   0.00633
Si   0.42800   0.09200   0.25000 ?
O1   0.77100   0.10700   0.25000  -0.01013
O2   0.23700   0.47900   0.25000  -0.01013
O3   0.31400   0.15900   0.04000  -0.00380