data_[Ca3Mg6W3O18]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ca  1.0000  1.8000  1.1400
  Mg  1.3100  1.5000  0.8600
  W  2.3600  1.3500  0.7667
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [R3]
_cell_length_a [5.3520]
_cell_length_b [5.3520]
_cell_length_c [14.5071]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [146]
_chemical_formula_structural [CaMg2WO6]
_chemical_formula_sum '[Ca3 Mg6 W3 O18]'
_cell_volume [359.8680]
_cell_formula_units_Z [3]
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
[
  Ca  Ca0  3  0.0000  0.0000  0.8035  1.0
  Mg  Mg1  3  0.0000  0.0000  0.0183  1.0
  Mg  Mg2  3  0.0000  0.0000  0.5226  1.0
  W  W3  3  0.0000  0.0000  0.3202  1.0
  O  O4  9  0.0241  0.3435  0.9218  1.0
  O  O5  9  0.0724  0.7016  0.0772  1.0
]