data_[K2Er1Cr1O4]
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
  Cr  1.6600  1.4000  0.9400
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [P2/m]
_cell_length_a [5.6487]
_cell_length_b [3.3026]
_cell_length_c [6.4537]
_cell_angle_alpha [90.0000]
_cell_angle_beta [107.2849]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [10]
_chemical_formula_structural [K2ErCrO4]
_chemical_formula_sum '[K2 Er1 Cr1 O4]'
_cell_volume [114.9569]
_cell_formula_units_Z [1]
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  1  0.0000  0.5000  0.5000  1.0
  K  K1  1  0.5000  0.0000  0.5000  1.0
  Er  Er2  1  0.0000  0.0000  0.0000  1.0
  Cr  Cr3  1  0.5000  0.5000  0.0000  1.0
  O  O4  2  0.2453  0.5000  0.1820  1.0
  O  O5  2  0.2918  0.0000  0.8239  1.0
]