data_[Sr3Be6Se3]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Sr  0.9500  2.0000  1.3200
  Be  1.5700  1.0500  0.5900
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [R3m]
_cell_length_a [4.0191]
_cell_length_b [4.0191]
_cell_length_c [17.0806]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [160]
_chemical_formula_structural [SrBe2Se]
_chemical_formula_sum '[Sr3 Be6 Se3]'
_cell_volume [238.9409]
_cell_formula_units_Z [3]
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
[
  Sr  Sr0  3  0.0000  0.0000  0.7336  1
  Be  Be1  3  0.0000  0.0000  0.2792  1
  Be  Be2  3  0.0000  0.0000  0.9499  1
  Se  Se3  3  0.0000  0.0000  0.5373  1
]