data_9000945
_chemical_name 'Tetrahedrite'
loop_
_publ_author_name
'Johnson M L'
'Burnham C W'
_journal_name_full "American Mineralogist"
_journal_volume 70
_journal_year 1985
_journal_page_first 165
_journal_page_last 170
_publ_section_title
;
 Crystal structure refinement of an arsenic-bearing argentian tetrahedrite
;
_chemical_formula_sum 'Cu7.68 Fe1.44 Ag2.118 (Sb2.7 As1.3) S13'
_cell_length_a 10.530
_cell_length_b 10.530
_cell_length_c 10.530
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 1167.576
_symmetry_space_group_name_H-M 'I -4 3 m'
loop_
_symmetry_equiv_pos_as_xyz
  'x,y,z'
  '1/2+x,1/2+y,1/2+z'
  '-z,x,-y'
  '1/2-z,1/2+x,1/2-y'
  '-y,z,-x'
  '1/2-y,1/2+z,1/2-x'
  '-x,y,-z'
  '1/2-x,1/2+y,1/2-z'
  'x,-z,-y'
  '1/2+x,1/2-z,1/2-y'
  'z,-y,-x'
  '1/2+z,1/2-y,1/2-x'
  'y,-x,-z'
  '1/2+y,1/2-x,1/2-z'
  'x,z,y'
  '1/2+x,1/2+z,1/2+y'
  'z,y,x'
  '1/2+z,1/2+y,1/2+x'
  'y,x,z'
  '1/2+y,1/2+x,1/2+z'
  '-z,-x,y'
  '1/2-z,1/2-x,1/2+y'
  '-y,-z,x'
  '1/2-y,1/2-z,1/2+x'
  '-x,-y,z'
  '1/2-x,1/2-y,1/2+z'
  'z,-x,-y'
  '1/2+z,1/2-x,1/2-y'
  'y,-z,-x'
  '1/2+y,1/2-z,1/2-x'
  'x,-y,-z'
  '1/2+x,1/2-y,1/2-z'
  '-x,z,-y'
  '1/2-x,1/2+z,1/2-y'
  '-z,y,-x'
  '1/2-z,1/2+y,1/2-x'
  '-y,x,-z'
  '1/2-y,1/2+x,1/2-z'
  '-x,-z,y'
  '1/2-x,1/2-z,1/2+y'
  '-z,-y,x'
  '1/2-z,1/2-y,1/2+x'
  '-y,-x,z'
  '1/2-y,1/2-x,1/2+z'
  'z,x,y'
  '1/2+z,1/2+x,1/2+y'
  'y,z,x'
  '1/2+y,1/2+z,1/2+x'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
_atom_site_Uiso_or_equiv
Cu1   0.25000   0.50000   0.00000   0.63300 ?
Fe1   0.25000   0.50000   0.00000   0.24000 ?
Cu2   0.21600   0.00000   0.00000   0.64700 ?
Ag2   0.21600   0.00000   0.00000   0.35300 ?
Sb   0.26830   0.26830   0.26830   0.67500 ?
As   0.26830   0.26830   0.26830   0.32500 ?
S1   0.12380   0.12380   0.36610   1.00000 ?
S2   0.00000   0.00000   0.00000   1.00000   0.06586