data_[Mg8Si8O24]
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
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [P2_1/c]
_cell_length_a [6.4199]
_cell_length_b [15.1714]
_cell_length_c [5.1295]
_cell_angle_alpha [90.0000]
_cell_angle_beta [92.5804]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [14]
_chemical_formula_structural [MgSiO3]
_chemical_formula_sum '[Mg8 Si8 O24]'
_cell_volume [499.1011]
_cell_formula_units_Z [8]
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  0.1064  0.1647  0.8586  1
  Mg  Mg1  4  0.3334  0.1184  0.4119  1
  Si  Si2  4  0.1032  0.6382  0.1641  1
  Si  Si3  4  0.3736  0.5934  0.7041  1
  O  O4  4  0.0494  0.0873  0.5449  1
  O  O5  4  0.0800  0.2094  0.2339  1
  O  O6  4  0.1886  0.6166  0.4719  1
  O  O7  4  0.3160  0.6511  0.9945  1
  O  O8  4  0.3816  0.0096  0.2446  1
  O  O9  4  0.4053  0.1450  0.8162  1
]