data_FeB2Se
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.75
_cell_length_b   3.75
_cell_length_c   2.92
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   FeB2Se
_chemical_formula_sum   'Fe1 B2 Se1'
_cell_volume   41.22
_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
  Fe  Fe2  1  0.0  0.0  0.0  1.0
  B  B0  1  0.88  0.0  0.46  1.0
  B  B1  1  0.0  0.88  0.46  1.0
  Se  Se3  1  0.88  0.88  0.0  1.0

data_FeB2Se
_symmetry_space_group_name_H-M   Cm
_cell_length_a   5.31
_cell_length_b   5.31
_cell_length_c   2.92
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   FeB2Se
_chemical_formula_sum   'Fe2 B4 Se2'
_cell_volume   82.44
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  'x, -y, z'
  3  'x+1/2, y+1/2, z'
  4  'x+1/2, -y+1/2, 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
  Fe  Fe0  2  0.0  0.0  0.0  1.0
  B  B1  4  0.44  0.44  0.46  1.0
  Se  Se2  2  0.38  0.5  0.0  1.0

Fe B B Se
FeSe(B)2 crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two 14452-61-0 molecules and two iron selenide molecules.