data_[K2Er2Ge2Te6]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  K  0.8200  2.2000  1.5200
  Er  1.2400  1.7500  1.0300
  Ge  2.0100  1.2500  0.7700
  Te  2.1000  1.4000  1.2933
]
_symmetry_space_group_name_H-M [P2_1/m]
_cell_length_a [9.2160]
_cell_length_b [4.2807]
_cell_length_c [11.6662]
_cell_angle_alpha [90.0000]
_cell_angle_beta [109.8115]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [11]
_chemical_formula_structural [KErGeTe3]
_chemical_formula_sum '[K2 Er2 Ge2 Te6]'
_cell_volume [433.0054]
_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  0.2311  0.2500  0.2789  1.0
  Er  Er1  2  0.3654  0.7500  0.8410  1.0
  Ge  Ge2  2  0.1180  0.2500  0.5524  1.0
  Te  Te3  2  0.1088  0.2500  0.7814  1.0
  Te  Te4  2  0.3303  0.7500  0.5672  1.0
  Te  Te5  2  0.3864  0.7500  0.1071  1.0
]