data_global
_chemical_name_mineral 'Chengdeite'
loop_
_publ_author_name
'Zuxiang Y'
_journal_name_full 'Acta Geologica Sinica'
_journal_volume 69 
_journal_year 1995
_journal_page_first 215
_journal_page_last 220
_publ_section_title
;
 Chengdeite - ordered natural iron-iridium alloy
;
_database_code_amcsd 0011977
_chemical_compound_source 'Placer deposits off the Luanhe River, China'
_chemical_formula_sum '(Ir2.913 Pt.072 Rh.012 Os.003) (Fe.91 Cu.08 Ni.005 Co.005)'
_cell_length_a 3.792
_cell_length_b 3.792
_cell_length_c 3.792
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 54.526
_exptl_crystal_density_diffrn     19.255
_symmetry_space_group_name_H-M 'P m 3 m'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  'z,-x,y'
  '-y,z,-x'
  'x,-y,z'
  '-z,x,-y'
  'y,-z,x'
  '-x,y,-z'
  'x,-z,-y'
  '-z,y,x'
  'y,-x,-z'
  '-x,z,y'
  'z,-y,-x'
  '-y,x,z'
  'x,z,y'
  '-z,-y,-x'
  'y,x,z'
  '-x,-z,-y'
  'z,y,x'
  '-y,-x,-z'
  'z,x,-y'
  '-y,-z,x'
  'x,y,-z'
  '-z,-x,y'
  'y,z,-x'
  '-x,-y,z'
  '-z,x,y'
  'y,-z,-x'
  '-x,y,z'
  'z,-x,-y'
  '-y,z,x'
  'x,-y,-z'
  '-x,z,-y'
  'z,-y,x'
  '-y,x,-z'
  'x,-z,y'
  '-z,y,-x'
  'y,-x,z'
  '-x,-z,y'
  'z,y,-x'
  '-y,-x,z'
  'x,z,-y'
  '-z,-y,x'
  'y,x,-z'
  '-z,-x,-y'
  'y,z,x'
  '-x,-y,-z'
  'z,x,y'
  '-y,-z,-x'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
Ir   0.00000   0.50000   0.50000   0.97100
Pt   0.00000   0.50000   0.50000   0.02400
Rh   0.00000   0.50000   0.50000   0.00400
Os   0.00000   0.50000   0.50000   0.00100
Fe   0.00000   0.00000   0.00000   0.91000
Cu   0.00000   0.00000   0.00000   0.08000
Ni   0.00000   0.00000   0.00000   0.00500
Co   0.00000   0.00000   0.00000   0.00500