data_[K2Mn2Be2Se6]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  K  0.8200  2.2000  1.5200
  Mn  1.5500  1.4000  0.6483
  Be  1.5700  1.0500  0.5900
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [P2_1/m]
_cell_length_a [8.9285]
_cell_length_b [3.6933]
_cell_length_c [9.4814]
_cell_angle_alpha [90.0000]
_cell_angle_beta [108.9441]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [11]
_chemical_formula_structural [KMnBeSe3]
_chemical_formula_sum '[K2 Mn2 Be2 Se6]'
_cell_volume [295.7232]
_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  0.2013  0.7500  0.2313  1
  Mn  Mn1  2  0.3441  0.2500  0.8676  1
  Be  Be2  2  0.0833  0.7500  0.5951  1
  Se  Se3  2  0.1430  0.7500  0.8467  1
  Se  Se4  2  0.1838  0.2500  0.5199  1
  Se  Se5  2  0.4769  0.2500  0.1607  1
]