data_[K4Si2P2]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  K  0.8200  2.2000  1.5200
  Si  1.9000  1.1000  0.5400
  P  2.1900  1.0000  0.5500
]
_symmetry_space_group_name_H-M [Amm2]
_cell_length_a [3.7341]
_cell_length_b [5.2781]
_cell_length_c [11.9307]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [38]
_chemical_formula_structural [K2SiP]
_chemical_formula_sum '[K4 Si2 P2]'
_cell_volume [235.1395]
_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
[
  K  K0  2  0.0000  0.0000  0.9784  1.0
  K  K1  2  0.5000  0.0000  0.2678  1.0
  Si  Si2  2  0.5000  0.0000  0.5699  1.0
  P  P3  2  0.0000  0.0000  0.6844  1.0
]