[CIF]
data_NiSe
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.21111791
_cell_length_b   3.21111791
_cell_length_c   6.48976924
_cell_angle_alpha   90.00000000
_cell_angle_beta   90.00000000
_cell_angle_gamma   90.00000000
_symmetry_Int_Tables_number   1
_chemical_formula_structural   NiSe
_chemical_formula_sum   'Ni2 Se2'
_cell_volume   66.91781629
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
  Ni  Ni0  1  1.60555896  0.00000000  5.77558753  1
  Ni  Ni1  1  0.00000000  1.60555896  0.71418171  1
  Se  Se2  1  1.60555896  0.00000000  1.68896647  1
  Se  Se3  1  0.00000000  1.60555896  4.80080277  1
[/CIF]
