data_[K2Mg6Si8O24]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  K  0.8200  2.2000  1.5200
  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 [C2/m]
_cell_length_a [5.2530]
_cell_length_b [9.2513]
_cell_length_c [10.3724]
_cell_angle_alpha [90.0000]
_cell_angle_beta [98.6611]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [KMg3(SiO3)4]
_chemical_formula_sum '[K2 Mg6 Si8 O24]'
_cell_volume [498.3273]
_cell_formula_units_Z [2]
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
[
  K  K0  2  0.0000  0.0000  0.0000  1.0
  Mg  Mg1  4  0.0000  0.1656  0.5000  1.0
  Mg  Mg2  2  0.0000  0.5000  0.5000  1.0
  Si  Si3  8  0.0749  0.3330  0.2296  1.0
  O  O4  8  0.1176  0.3298  0.3859  1.0
  O  O5  8  0.1813  0.2371  0.8348  1.0
  O  O6  4  0.0309  0.5000  0.1701  1.0
  O  O7  4  0.1284  0.0000  0.4078  1.0
]