data_[Si6N8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Si  1.9000  1.1000  0.5400
  N  3.0400  0.6500  0.6300
]
_symmetry_space_group_name_H-M [P1]
_cell_length_a [7.0869]
_cell_length_b [17.5908]
_cell_length_c [17.5908]
_cell_angle_alpha [120.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [1]
_chemical_formula_structural [Si3N4]
_chemical_formula_sum '[Si6 N8]'
_cell_volume [1899.1286]
_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  1  0.2849  0.9729  0.6193  1
  Si  Si1  1  0.3653  0.0200  0.4056  1
  Si  Si2  1  0.5784  0.9594  0.4985  1
  Si  Si3  1  0.6807  0.8673  0.3416  1
  Si  Si4  1  0.9033  0.1493  0.5997  1
  Si  Si5  1  0.9690  0.9079  0.5154  1
  N  N6  1  0.0575  0.1036  0.5061  1
  N  N7  1  0.1325  0.9945  0.5380  1
  N  N8  1  0.1638  0.0399  0.4945  1
  N  N9  1  0.4675  0.9224  0.3962  1
  N  N10  1  0.5089  0.9597  0.5879  1
  N  N11  1  0.5642  0.0702  0.5107  1
  N  N12  1  0.6983  0.1220  0.5387  1
  N  N13  1  0.7938  0.9110  0.4476  1
]