data_[Si2Ni2B2C2]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Si  1.9000  1.1000  0.5400
  Ni  1.9100  1.3500  0.7400
  B  2.0400  0.8500  0.4100
  C  2.5500  0.7000  0.3000
]
_symmetry_space_group_name_H-M [Amm2]
_cell_length_a [3.1626]
_cell_length_b [2.7239]
_cell_length_c [9.4866]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [38]
_chemical_formula_structural [SiNiBC]
_chemical_formula_sum '[Si2 Ni2 B2 C2]'
_cell_volume [81.7220]
_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
[
  Si  Si0  2  0.0000  0.0000  0.4731  1
  Ni  Ni1  2  0.5000  0.0000  0.1012  1
  B  B2  2  0.0000  0.0000  0.7077  1
  C  C3  2  0.0000  0.0000  0.2749  1
]