data_global
_chemical_name_mineral 'Wilkmanite'
loop_
_publ_author_name
'Hiller J E'
'Wegener W'
_journal_name_full 'Neues Jahrbuch fur Mineralogie, Abhandlungen'
_journal_volume 94 
_journal_year 1960
_journal_page_first 1147
_journal_page_last 1159
_publ_section_title
;
 Untersuchungen im system nickel-selen
;
_database_code_amcsd 0014700
_chemical_formula_sum 'Ni3 Se4'
_cell_length_a 6.19
_cell_length_b 3.633
_cell_length_c 10.45
_cell_angle_alpha 90
_cell_angle_beta 90.05
_cell_angle_gamma 90
_cell_volume 235.002
_exptl_crystal_density_diffrn      6.952
_symmetry_space_group_name_H-M 'I 1 2/m 1'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2+x,1/2+y,1/2+z'
  'x,-y,z'
  '1/2+x,1/2-y,1/2+z'
  '-x,y,-z'
  '1/2-x,1/2+y,1/2-z'
  '-x,-y,-z'
  '1/2-x,1/2-y,1/2-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
Ni1   0.00000   0.00000   0.00000
Ni2   0.00000   0.00000   0.25000
Se1   0.33333   0.00000   0.12500
Se2   0.33333   0.00000   0.62500