data_[Na2Sm2P4O14]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Sm  1.1700  1.8500  1.2290
  P  2.1900  1.0000  0.5500
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [C2]
_cell_length_a [7.0846]
_cell_length_b [9.2119]
_cell_length_c [4.8255]
_cell_angle_alpha [90.0000]
_cell_angle_beta [101.4411]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [5]
_chemical_formula_structural [NaSmP2O7]
_chemical_formula_sum '[Na2 Sm2 P4 O14]'
_cell_volume [308.6693]
_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
[
  Na  Na0  2  0.0000  0.2508  0.5000  1.0
  Sm  Sm1  2  0.0000  0.6350  0.5000  1.0
  P  P2  4  0.2008  0.9620  0.9199  1.0
  O  O3  4  0.1534  0.4509  0.8004  1.0
  O  O4  4  0.1693  0.8164  0.7658  1.0
  O  O5  4  0.2469  0.0857  0.7294  1.0
  O  O6  2  0.0000  0.0173  0.0000  1.0
]