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 = 42 kb
;
_database_code_amcsd 0000569
_chemical_compound_source 'Synthetic'
_chemical_formula_sum 'Fe2 Si O4'
_cell_length_a 4.801
_cell_length_b 10.220
_cell_length_c 6.049
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 296.802
_exptl_crystal_density_diffrn      4.560
_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   0.01013
Fe2   0.97800   0.27800   0.25000   0.00633
Si   0.42100   0.11000   0.25000   0.00507
O1   0.76300   0.09200   0.25000   0.00633
O2   0.22500   0.47400   0.25000   0.00633
O3   0.28500   0.16300   0.04400   0.01773