data_[K4Na2P4O12]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  K  0.8200  2.2000  1.5200
  Na  0.9300  1.8000  1.1600
  P  2.1900  1.0000  0.5500
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [10.3175]
_cell_length_b [5.8631]
_cell_length_c [6.7487]
_cell_angle_alpha [90.0000]
_cell_angle_beta [121.3298]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [K2Na(PO3)2]
_chemical_formula_sum '[K4 Na2 P4 O12]'
_cell_volume [348.7171]
_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  4  0.2087  0.5000  0.1846  1
  Na  Na1  2  0.0000  0.5000  0.5000  1
  P  P2  4  0.0431  0.0000  0.2051  1
  O  O3  8  0.0300  0.2208  0.7808  1
  O  O4  4  0.2147  0.0000  0.3198  1
]