The crystal structure described by Sm3CoGaSe7 crystallizes in the hexagonal P6_3 space group. Sm(1) is bonded in a 7-coordinate geometry to one Se(2), three equivalent Se(1), and three equivalent Se(3) atoms. Co(1) is bonded to six equivalent Se(3) atoms to form face-sharing CoSe6 octahedra. Ga(1) is bonded in a tetrahedral geometry to one Se(2) and three equivalent Se(1) atoms. There are three inequivalent Se sites. In the first Se site, Se(1) is bonded in a distorted rectangular see-saw-like geometry to three equivalent Sm(1) and one Ga(1) atom. In the second Se site, Se(2) is bonded to three equivalent Sm(1) and one Ga(1) atom to form corner-sharing SeSm3Ga tetrahedra. In the third Se site, Se(3) is bonded to three equivalent Sm(1) and two equivalent Co(1) atoms to form distorted SeSm3Co2 square pyramids that share corners with two equivalent Se(3)Sm3Co2 square pyramids, corners with three equivalent Se(2)Sm3Ga tetrahedra, edges with four equivalent Se(3)Sm3Co2 square pyramids, and faces with two equivalent Se(3)Sm3Co2 square pyramids. is represented by the CIF card [CIF]
data_Sm3GaCoSe7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.462
_cell_length_b   10.170
_cell_length_c   10.170
_cell_angle_alpha   120.001
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   578.798
_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  0.178  0.842  0.215  1.0
  Sm  Sm1  1  0.178  0.785  0.627  1.0
  Sm  Sm2  1  0.178  0.373  0.158  1.0
  Sm  Sm3  1  0.678  0.158  0.785  1.0
  Sm  Sm4  1  0.678  0.215  0.373  1.0
  Sm  Sm5  1  0.678  0.627  0.842  1.0
  Ga  Ga6  1  0.099  0.333  0.667  1.0
  Ga  Ga7  1  0.599  0.667  0.333  1.0
  Co  Co8  1  0.503  1.000  1.000  1.0
  Co  Co9  1  0.003  0.000  0.000  1.0
  Se  Se10  1  0.450  0.563  0.083  1.0
  Se  Se11  1  0.450  0.917  0.480  1.0
  Se  Se12  1  0.450  0.520  0.437  1.0
  Se  Se13  1  0.950  0.437  0.917  1.0
  Se  Se14  1  0.950  0.083  0.520  1.0
  Se  Se15  1  0.950  0.480  0.563  1.0
  Se  Se16  1  0.470  0.333  0.667  1.0
  Se  Se17  1  0.970  0.667  0.333  1.0
  Se  Se18  1  0.259  0.128  0.225  1.0
  Se  Se19  1  0.259  0.775  0.903  1.0
  Se  Se20  1  0.259  0.097  0.872  1.0
  Se  Se21  1  0.759  0.872  0.775  1.0
  Se  Se22  1  0.759  0.225  0.097  1.0
  Se  Se23  1  0.759  0.903  0.128  1.0
[/CIF]
.
The crystal structure described by Sm3CoGaSe7 crystallizes in the hexagonal P6_3 space group. Sm(1) is bonded in a 7-coordinate geometry to one Se(2), three equivalent Se(1), and three equivalent Se(3) atoms. Co(1) is bonded to six equivalent Se(3) atoms to form face-sharing CoSe6 octahedra. Ga(1) is bonded in a tetrahedral geometry to one Se(2) and three equivalent Se(1) atoms. There are three inequivalent Se sites. In the first Se site, Se(1) is bonded in a distorted rectangular see-saw-like geometry to three equivalent Sm(1) and one Ga(1) atom. In the second Se site, Se(2) is bonded to three equivalent Sm(1) and one Ga(1) atom to form corner-sharing SeSm3Ga tetrahedra. In the third Se site, Se(3) is bonded to three equivalent Sm(1) and two equivalent Co(1) atoms to form distorted SeSm3Co2 square pyramids that share corners with two equivalent Se(3)Sm3Co2 square pyramids, corners with three equivalent Se(2)Sm3Ga tetrahedra, edges with four equivalent Se(3)Sm3Co2 square pyramids, and faces with two equivalent Se(3)Sm3Co2 square pyramids. is represented by the CIF card [CIF]
data_Sm3GaCoSe7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.462
_cell_length_b   10.170
_cell_length_c   10.170
_cell_angle_alpha   120.001
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   578.798
_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  0.178  0.842  0.215  1.0
  Sm  Sm1  1  0.178  0.785  0.627  1.0
  Sm  Sm2  1  0.178  0.373  0.158  1.0
  Sm  Sm3  1  0.678  0.158  0.785  1.0
  Sm  Sm4  1  0.678  0.215  0.373  1.0
  Sm  Sm5  1  0.678  0.627  0.842  1.0
  Ga  Ga6  1  0.099  0.333  0.667  1.0
  Ga  Ga7  1  0.599  0.667  0.333  1.0
  Co  Co8  1  0.503  1.000  1.000  1.0
  Co  Co9  1  0.003  0.000  0.000  1.0
  Se  Se10  1  0.450  0.563  0.083  1.0
  Se  Se11  1  0.450  0.917  0.480  1.0
  Se  Se12  1  0.450  0.520  0.437  1.0
  Se  Se13  1  0.950  0.437  0.917  1.0
  Se  Se14  1  0.950  0.083  0.520  1.0
  Se  Se15  1  0.950  0.480  0.563  1.0
  Se  Se16  1  0.470  0.333  0.667  1.0
  Se  Se17  1  0.970  0.667  0.333  1.0
  Se  Se18  1  0.259  0.128  0.225  1.0
  Se  Se19  1  0.259  0.775  0.903  1.0
  Se  Se20  1  0.259  0.097  0.872  1.0
  Se  Se21  1  0.759  0.872  0.775  1.0
  Se  Se22  1  0.759  0.225  0.097  1.0
  Se  Se23  1  0.759  0.903  0.128  1.0
[/CIF]
.