data_[Ca4Si4Ge4O20]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ca  1.0000  1.8000  1.1400
  Si  1.9000  1.1000  0.5400
  Ge  2.0100  1.2500  0.7700
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [C2/c]
_cell_length_a [6.4928]
_cell_length_b [8.6452]
_cell_length_c [6.8060]
_cell_angle_alpha [90.0000]
_cell_angle_beta [113.5020]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [15]
_chemical_formula_structural [CaSiGeO5]
_chemical_formula_sum '[Ca4 Si4 Ge4 O20]'
_cell_volume [350.3418]
_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
[
  Ca  Ca0  4  0.0000  0.1676  0.2500  1
  Si  Si1  4  0.0000  0.1833  0.7500  1
  Ge  Ge2  4  0.0000  0.5000  0.0000  1
  O  O3  8  0.1026  0.2921  0.6118  1
  O  O4  8  0.1874  0.0652  0.9165  1
  O  O5  4  0.0000  0.4270  0.2500  1
]