data_[Mg4Ti4Si4O20]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Mg  1.3100  1.5000  0.8600
  Ti  1.5400  1.4000  0.8517
  Si  1.9000  1.1000  0.5400
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [Cc]
_cell_length_a [6.5379]
_cell_length_b [8.3796]
_cell_length_c [7.1606]
_cell_angle_alpha [90.0000]
_cell_angle_beta [114.7930]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [9]
_chemical_formula_structural [MgTiSiO5]
_chemical_formula_sum '[Mg4 Ti4 Si4 O20]'
_cell_volume [356.1378]
_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  0.4952  0.6715  0.7455  1.0
  Ti  Ti1  4  0.4983  0.0070  0.4936  1.0
  Si  Si2  4  0.4998  0.3268  0.7601  1.0
  O  O3  4  0.1105  0.2839  0.1374  1.0
  O  O4  4  0.1777  0.0481  0.4220  1.0
  O  O5  4  0.3209  0.4502  0.6001  1.0
  O  O6  4  0.3886  0.2159  0.8835  1.0
  O  O7  4  0.4978  0.0897  0.2615  1.0
]