data_[K8Sn4P8O28]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  K  0.8200  2.2000  1.5200
  Sn  1.9600  1.4500  0.8300
  P  2.1900  1.0000  0.5500
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [P2_1/c]
_cell_length_a [10.0209]
_cell_length_b [6.8821]
_cell_length_c [13.3702]
_cell_angle_alpha [90.0000]
_cell_angle_beta [117.6457]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [14]
_chemical_formula_structural [K2SnP2O7]
_chemical_formula_sum '[K8 Sn4 P8 O28]'
_cell_volume [816.8049]
_cell_formula_units_Z [4]
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  0.0211  0.1468  0.8401  1
  K  K1  4  0.4847  0.6290  0.3531  1
  Sn  Sn2  4  0.2520  0.6527  0.0050  1
  P  P3  4  0.1514  0.1410  0.6446  1
  P  P4  4  0.3623  0.1326  0.3506  1
  O  O5  4  0.0043  0.2456  0.6216  1
  O  O6  4  0.1677  0.1206  0.5345  1
  O  O7  4  0.1801  0.5483  0.2088  1
  O  O8  4  0.2455  0.5122  0.8561  1
  O  O9  4  0.2857  0.2008  0.2170  1
  O  O10  4  0.3898  0.1904  0.9240  1
  O  O11  4  0.4960  0.5244  0.1362  1
]