data_[K2Zr2Si4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  K  0.8200  2.2000  1.5200
  Zr  1.3300  1.5500  0.8600
  Si  1.9000  1.1000  0.5400
]
_symmetry_space_group_name_H-M [I-4m2]
_cell_length_a [4.1591]
_cell_length_b [4.1591]
_cell_length_c [9.8293]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [119]
_chemical_formula_structural [KZrSi2]
_chemical_formula_sum '[K2 Zr2 Si4]'
_cell_volume [170.0313]
_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  0.5000  0.2500  1
  Zr  Zr1  2  0.0000  0.0000  0.5000  1
  Si  Si2  2  0.0000  0.0000  0.0000  1
  Si  Si3  2  0.0000  0.5000  0.7500  1
]