data_Sm
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.56
_cell_length_b   5.56
_cell_length_c   5.52
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Sm
_chemical_formula_sum   Sm4
_cell_volume   147.65
_cell_formula_units_Z   4
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
  Sm  Sm0  1  0.0  0.0  0.38  1.0
  Sm  Sm1  1  0.0  0.21  0.38  1.0
  Sm  Sm2  1  0.0  0.0  0.14  1.0
  Sm  Sm3  1  0.78  0.6  0.14  1.0

data_Sm
_symmetry_space_group_name_H-M   P1
_cell_length_a   5.52
_cell_length_b   5.56
_cell_length_c   5.56
_cell_angle_alpha   120.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Sm
_chemical_formula_sum   Sm4
_cell_volume   147.65
_cell_formula_units_Z   4
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
  Sm  Sm0  1  0.14  0.0  0.0  1.0
  Sm  Sm1  1  0.14  0.78  0.6  1.0
  Sm  Sm2  1  0.38  0.0  0.0  1.0
  Sm  Sm3  1  0.38  0.0  0.21  1.0

Sm Sm Sm Sm
Sm is Hg_xSn structured and crystallizes in the triclinic P1 space group. The structure is zero-dimensional and consists of one Sm cluster. There are four inequivalent Sm sites. In the first Sm site, Sm(1) is bonded in an L-shaped geometry to one Sm(2) and one Sm(3) atom. The Sm(1)-Sm(2) bond length is 1.17 Å. The Sm(1)-Sm(3) bond length is 1.33 Å. In the second Sm site, Sm(2) is bonded in a distorted single-bond geometry to one Sm(1) atom. In the third Sm site, Sm(3) is bonded in a 1-coordinate geometry to one Sm(1) and one Sm(4) atom. The Sm(3)-Sm(4) bond length is 1.91 Å. In the fourth Sm site, Sm(4) is bonded in a 1-coordinate geometry to one Sm(3) atom.