data_[Yb12Si4O4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Yb  1.1000  1.7500  1.0840
  Si  1.9000  1.1000  0.5400
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [Imma]
_cell_length_a [6.5816]
_cell_length_b [9.3077]
_cell_length_c [6.5896]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [74]
_chemical_formula_structural [Yb3SiO]
_chemical_formula_sum '[Yb12 Si4 O4]'
_cell_volume [403.6716]
_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
[
  Yb  Yb0  8  0.2500  0.0100  0.7500  1.0
  Yb  Yb1  4  0.0000  0.2500  0.4803  1.0
  Si  Si2  4  0.0000  0.2500  0.9999  1.0
  O  O3  4  0.0000  0.0000  0.5000  1.0
]