data_global
_chemical_name_mineral 'Sederholmite'
loop_
_publ_author_name
'Rost E'
'Vestersjo E'
_journal_name_full 'Acta Chemica Scandinavica'
_journal_volume 22 
_journal_year 1968
_journal_page_first 2118
_journal_page_last 2134
_publ_section_title
;
 On the system Ni-Se-Te
 Note: Phase F, sample 84
;
_database_code_amcsd 0011905
_chemical_compound_source 'Synthetic'
_chemical_formula_sum 'Ni.984 Se.816 Te.2'
_cell_length_a 3.722
_cell_length_b 3.722
_cell_length_c 5.350
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 120
_cell_volume 64.186
_exptl_crystal_density_diffrn      7.642
_symmetry_space_group_name_H-M 'P 63/m m c'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '-x,-x+y,1/2+z'
  'x,x-y,1/2-z'
  '-x+y,-x,1/2-z'
  'x-y,x,1/2+z'
  '-y,-x,z'
  'y,x,-z'
  'y,-x+y,-z'
  '-y,x-y,z'
  'x-y,-y,1/2+z'
  '-x+y,y,1/2-z'
  'x,y,1/2-z'
  '-x,-y,1/2+z'
  'x,x-y,z'
  '-x,-x+y,-z'
  'x-y,x,-z'
  '-x+y,-x,z'
  'y,x,1/2+z'
  '-y,-x,1/2-z'
  '-y,x-y,1/2-z'
  'y,-x+y,1/2+z'
  '-x+y,y,z'
  'x-y,-y,-z'
  '-x,-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
Ni   0.00000   0.00000   0.00000   0.98400
Se   0.00000   0.00000   0.00000   0.01600
Se   0.33333   0.66667   0.25000   0.80000
Te   0.33333   0.66667   0.25000   0.20000