data_global
_chemical_name_mineral 'Spinelloid'
loop_
_publ_author_name
'Ross C R'
'Armbruster T'
'Canil D'
_journal_name_full 'American Mineralogist'
_journal_volume 77 
_journal_year 1992
_journal_page_first 507
_journal_page_last 511
_publ_section_title
;
 Crystal structure refinement of a spinelloid in the system Fe3O4-Fe2SiO4
;
_database_code_amcsd 0001459
_chemical_formula_sum 'Fe2.68 Si.32 O4'
_cell_length_a 5.867
_cell_length_b 8.917
_cell_length_c 8.362
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 437.467
_exptl_crystal_density_diffrn      5.071
_symmetry_space_group_name_H-M 'P m m a'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  'x,-y,z'
  '-x,y,-z'
  '1/2-x,y,z'
  '1/2+x,-y,-z'
  '1/2+x,y,-z'
  '1/2-x,-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
Fe1   0.75000   0.16590   0.24950   1.00000   0.00470
Fe2   0.50000   0.00000   0.00000   1.00000   0.00620
Fe3   0.50000   0.33330   0.50000   1.00000   0.00520
Fe4   0.75000   0.50000   0.21850   1.00000   0.00380
Fe1   0.25000   0.00000   0.37640   0.84000   0.00500
Si1   0.25000   0.00000   0.37640   0.16000   0.00500
Fe2   0.25000   0.32550   0.13210   0.60000   0.00500
Si2   0.25000   0.32550   0.13210   0.40000   0.00500
O1   0.50460   0.00000   0.24770   1.00000   0.01130
O2   0.25000   0.17150   0.00310   1.00000   0.01100
O3   0.25000   0.16940   0.50100   1.00000   0.00920
O4   0.49510   0.32870   0.25130   1.00000   0.01090
O5   0.25000   0.50000   0.02800   1.00000   0.01340
O6   0.25000   0.50000   0.52500   1.00000   0.00710