data_[Ni12As4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ni  1.9100  1.3500  0.7400
  As  2.1800  1.1500  0.6600
]
_symmetry_space_group_name_H-M [Cmcm]
_cell_length_a [4.9412]
_cell_length_b [9.2427]
_cell_length_c [4.1876]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [63]
_chemical_formula_structural [Ni3As]
_chemical_formula_sum '[Ni12 As4]'
_cell_volume [191.2474]
_cell_formula_units_Z [4]
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  8  0.2487  0.6581  0.7500  1.0
  Ni  Ni1  4  0.0000  0.0809  0.2500  1.0
  As  As2  4  0.0000  0.3763  0.7500  1.0
]