data_[K2Tm2Si2O8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  K  0.8200  2.2000  1.5200
  Tm  1.2500  1.7500  1.0950
  Si  1.9000  1.1000  0.5400
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [P2_1/m]
_cell_length_a [5.5267]
_cell_length_b [5.6547]
_cell_length_c [7.3091]
_cell_angle_alpha [90.0000]
_cell_angle_beta [106.5648]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [11]
_chemical_formula_structural [KTmSiO4]
_chemical_formula_sum '[K2 Tm2 Si2 O8]'
_cell_volume [218.9386]
_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  0.3132  0.2500  0.0725  1.0
  Tm  Tm1  2  0.2108  0.2500  0.5413  1.0
  Si  Si2  2  0.2510  0.7500  0.3392  1.0
  O  O3  4  0.0516  0.5245  0.3192  1.0
  O  O4  2  0.4372  0.7500  0.2013  1.0
  O  O5  2  0.4422  0.7500  0.5583  1.0
]