data_[Sm4Si4O14]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Sm  1.1700  1.8500  1.2290
  Si  1.9000  1.1000  0.5400
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [7.0730]
_cell_length_b [9.2792]
_cell_length_c [4.8091]
_cell_angle_alpha [90.0000]
_cell_angle_beta [101.4435]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Sm2Si2O7]
_chemical_formula_sum '[Sm4 Si4 O14]'
_cell_volume [309.3555]
_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
[
  Sm  Sm0  4  0.0000  0.3061  0.0000  1.0
  Si  Si1  4  0.2153  0.0000  0.4134  1.0
  O  O2  8  0.2347  0.1459  0.2249  1.0
  O  O3  4  0.1250  0.5000  0.2886  1.0
  O  O4  2  0.0000  0.0000  0.5000  1.0
]