data_[Na8Mg4Ni4As8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Mg  1.3100  1.5000  0.8600
  Ni  1.9100  1.3500  0.7400
  As  2.1800  1.1500  0.6600
]
_symmetry_space_group_name_H-M [Ibam]
_cell_length_a [5.7731]
_cell_length_b [14.3563]
_cell_length_c [5.9643]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [72]
_chemical_formula_structural [Na2MgNiAs2]
_chemical_formula_sum '[Na8 Mg4 Ni4 As8]'
_cell_volume [494.3273]
_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
[
  Na  Na0  8  0.2422  0.8197  0.5000  1
  Mg  Mg1  4  0.0000  0.0000  0.2500  1
  Ni  Ni2  4  0.0000  0.5000  0.2500  1
  As  As3  8  0.2129  0.3961  0.0000  1
]