data_[Mg4Si4Ge4O20]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Mg  1.3100  1.5000  0.8600
  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 [7.0840]
_cell_length_b [8.1464]
_cell_length_c [6.9025]
_cell_angle_alpha [90.0000]
_cell_angle_beta [117.7404]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [15]
_chemical_formula_structural [MgSiGeO5]
_chemical_formula_sum '[Mg4 Si4 Ge4 O20]'
_cell_volume [352.5543]
_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
[
  Mg  Mg0  4  0.0000  0.3124  0.2500  1
  Si  Si1  4  0.0000  0.3497  0.7500  1
  Ge  Ge2  4  0.0000  0.0000  0.0000  1
  O  O3  8  0.0256  0.2369  0.5657  1
  O  O4  8  0.1932  0.4872  0.8598  1
  O  O5  4  0.0000  0.0720  0.2500  1
]