data_FeSn2Sb
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.24
_cell_length_b   3.24
_cell_length_c   8.23
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   FeSn2Sb
_chemical_formula_sum   'Fe1 Sn2 Sb1'
_cell_volume   86.58
_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  Fe0  1  0.0  0.0  0.14  1.0
  Sn  Sn2  1  0.0  0.0  0.05  1.0
  Sn  Sn3  1  0.62  0.62  0.52  1.0
  Sb  Sb1  1  0.62  0.62  0.63  1.0

data_FeSn2Sb
_symmetry_space_group_name_H-M   Cm
_cell_length_a   4.59
_cell_length_b   4.59
_cell_length_c   8.23
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   FeSn2Sb
_chemical_formula_sum   'Fe2 Sn4 Sb2'
_cell_volume   173.16
_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  0.14  1.0
  Sn  Sn1  2  0.0  0.0  0.05  1.0
  Sn  Sn2  2  0.12  0.5  0.52  1.0
  Sb  Sb3  2  0.12  0.5  0.63  1.0

Fe Sn Sn Sb
FeSnSnSb is beta oxygen-derived structured and crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two tin antimonide molecules and two FeSn clusters. In each FeSn cluster, Fe(1) is bonded in a single-bond geometry to one Sn(1) atom. The Fe(1)-Sn(1) bond length is 0.73 Å. Sn(1) is bonded in a single-bond geometry to one Fe(1) atom.