The structure described by SmGa2S4 crystallizes in the orthorhombic Cccm space group. Sm(1) is bonded in a 8-coordinate geometry to four equivalent S(1) and four equivalent S(2) atoms. Ga(1) is bonded to two equivalent S(1) and two equivalent S(2) atoms to form edge-sharing GaS4 tetrahedra. There are two inequivalent S sites. In the first S site, S(2) is bonded to two equivalent Sm(1) and two equivalent Ga(1) atoms to form a mixture of distorted corner and edge-sharing SSm2Ga2 trigonal pyramids. In the second S site, S(1) is bonded to two equivalent Sm(1) and two equivalent Ga(1) atoms to form a mixture of corner and edge-sharing SSm2Ga2 trigonal pyramids. is represented by the CIF file [CIF]
data_Sm(GaS2)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.799
_cell_length_b   5.799
_cell_length_c   10.045
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   114.674
_symmetry_Int_Tables_number   1
_cell_volume   306.912
_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
  Sm  Sm0  1  0.500  0.500  0.750  1.0
  Sm  Sm1  1  0.500  0.500  0.250  1.0
  Ga  Ga2  1  0.785  0.225  0.500  1.0
  Ga  Ga3  1  0.215  0.775  0.500  1.0
  Ga  Ga4  1  0.775  0.215  0.000  1.0
  Ga  Ga5  1  0.225  0.785  0.000  1.0
  S  S6  1  0.359  0.217  0.500  1.0
  S  S7  1  0.641  0.783  0.500  1.0
  S  S8  1  0.783  0.641  0.000  1.0
  S  S9  1  0.217  0.359  0.000  1.0
  S  S10  1  0.500  0.000  0.820  1.0
  S  S11  1  0.000  0.500  0.680  1.0
  S  S12  1  0.500  0.000  0.180  1.0
  S  S13  1  0.000  0.500  0.320  1.0
[/CIF]
.
The structure described by SmGa2S4 crystallizes in the orthorhombic Cccm space group. Sm(1) is bonded in a 8-coordinate geometry to four equivalent S(1) and four equivalent S(2) atoms. Ga(1) is bonded to two equivalent S(1) and two equivalent S(2) atoms to form edge-sharing GaS4 tetrahedra. There are two inequivalent S sites. In the first S site, S(2) is bonded to two equivalent Sm(1) and two equivalent Ga(1) atoms to form a mixture of distorted corner and edge-sharing SSm2Ga2 trigonal pyramids. In the second S site, S(1) is bonded to two equivalent Sm(1) and two equivalent Ga(1) atoms to form a mixture of corner and edge-sharing SSm2Ga2 trigonal pyramids. is represented by the CIF file [CIF]
data_Sm(GaS2)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.799
_cell_length_b   5.799
_cell_length_c   10.045
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   114.674
_symmetry_Int_Tables_number   1
_cell_volume   306.912
_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
  Sm  Sm0  1  0.500  0.500  0.750  1.0
  Sm  Sm1  1  0.500  0.500  0.250  1.0
  Ga  Ga2  1  0.785  0.225  0.500  1.0
  Ga  Ga3  1  0.215  0.775  0.500  1.0
  Ga  Ga4  1  0.775  0.215  0.000  1.0
  Ga  Ga5  1  0.225  0.785  0.000  1.0
  S  S6  1  0.359  0.217  0.500  1.0
  S  S7  1  0.641  0.783  0.500  1.0
  S  S8  1  0.783  0.641  0.000  1.0
  S  S9  1  0.217  0.359  0.000  1.0
  S  S10  1  0.500  0.000  0.820  1.0
  S  S11  1  0.000  0.500  0.680  1.0
  S  S12  1  0.500  0.000  0.180  1.0
  S  S13  1  0.000  0.500  0.320  1.0
[/CIF]
.