The material described by Sm8CoGa3 crystallizes in the hexagonal P6_3mc space group. There are four inequivalent Sm sites. In the first Sm site, Sm(1) is bonded in a 4-coordinate geometry to one Co(1) and four equivalent Ga(1) atoms. In the second Sm site, Sm(2) is bonded to one Co(1) and three equivalent Ga(1) atoms to form distorted corner-sharing SmGa3Co tetrahedra. The corner-sharing octahedral tilt angles range from 13-48°. In the third Sm site, Sm(3) is bonded in a 3-coordinate geometry to one Co(1) and four equivalent Ga(1) atoms. In the fourth Sm site, Sm(4) is bonded to six equivalent Ga(1) atoms to form distorted SmGa6 octahedra that share corners with six equivalent Sm(2)Ga3Co tetrahedra and faces with two equivalent Sm(4)Ga6 octahedra. Co(1) is bonded in a 7-coordinate geometry to one Sm(2), three equivalent Sm(1), and three equivalent Sm(3) atoms. Ga(1) is bonded in a 11-coordinate geometry to one Sm(2), two equivalent Sm(4), four equivalent Sm(1), and four equivalent Sm(3) atoms. is represented by the CIF file [CIF]
data_Sm8Ga3Co
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.348
_cell_length_b   10.348
_cell_length_c   6.973
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   646.665
_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  0.828  0.657  0.497  1.0
  Sm  Sm1  1  0.343  0.172  0.497  1.0
  Sm  Sm2  1  0.828  0.172  0.497  1.0
  Sm  Sm3  1  0.172  0.343  0.997  1.0
  Sm  Sm4  1  0.657  0.828  0.997  1.0
  Sm  Sm5  1  0.172  0.828  0.997  1.0
  Sm  Sm6  1  0.667  0.333  0.168  1.0
  Sm  Sm7  1  0.333  0.667  0.668  1.0
  Sm  Sm8  1  0.536  0.071  0.788  1.0
  Sm  Sm9  1  0.929  0.464  0.788  1.0
  Sm  Sm10  1  0.536  0.464  0.788  1.0
  Sm  Sm11  1  0.464  0.929  0.288  1.0
  Sm  Sm12  1  0.071  0.536  0.288  1.0
  Sm  Sm13  1  0.464  0.536  0.288  1.0
  Sm  Sm14  1  0.000  0.000  0.782  1.0
  Sm  Sm15  1  0.000  0.000  0.282  1.0
  Ga  Ga16  1  0.836  0.672  0.032  1.0
  Ga  Ga17  1  0.328  0.164  0.032  1.0
  Ga  Ga18  1  0.836  0.164  0.032  1.0
  Ga  Ga19  1  0.164  0.328  0.532  1.0
  Ga  Ga20  1  0.672  0.836  0.532  1.0
  Ga  Ga21  1  0.164  0.836  0.532  1.0
  Co  Co22  1  0.667  0.333  0.560  1.0
  Co  Co23  1  0.333  0.667  0.060  1.0
[/CIF]
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The material described by Sm8CoGa3 crystallizes in the hexagonal P6_3mc space group. There are four inequivalent Sm sites. In the first Sm site, Sm(1) is bonded in a 4-coordinate geometry to one Co(1) and four equivalent Ga(1) atoms. In the second Sm site, Sm(2) is bonded to one Co(1) and three equivalent Ga(1) atoms to form distorted corner-sharing SmGa3Co tetrahedra. The corner-sharing octahedral tilt angles range from 13-48°. In the third Sm site, Sm(3) is bonded in a 3-coordinate geometry to one Co(1) and four equivalent Ga(1) atoms. In the fourth Sm site, Sm(4) is bonded to six equivalent Ga(1) atoms to form distorted SmGa6 octahedra that share corners with six equivalent Sm(2)Ga3Co tetrahedra and faces with two equivalent Sm(4)Ga6 octahedra. Co(1) is bonded in a 7-coordinate geometry to one Sm(2), three equivalent Sm(1), and three equivalent Sm(3) atoms. Ga(1) is bonded in a 11-coordinate geometry to one Sm(2), two equivalent Sm(4), four equivalent Sm(1), and four equivalent Sm(3) atoms. is represented by the CIF file [CIF]
data_Sm8Ga3Co
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.348
_cell_length_b   10.348
_cell_length_c   6.973
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   646.665
_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  0.828  0.657  0.497  1.0
  Sm  Sm1  1  0.343  0.172  0.497  1.0
  Sm  Sm2  1  0.828  0.172  0.497  1.0
  Sm  Sm3  1  0.172  0.343  0.997  1.0
  Sm  Sm4  1  0.657  0.828  0.997  1.0
  Sm  Sm5  1  0.172  0.828  0.997  1.0
  Sm  Sm6  1  0.667  0.333  0.168  1.0
  Sm  Sm7  1  0.333  0.667  0.668  1.0
  Sm  Sm8  1  0.536  0.071  0.788  1.0
  Sm  Sm9  1  0.929  0.464  0.788  1.0
  Sm  Sm10  1  0.536  0.464  0.788  1.0
  Sm  Sm11  1  0.464  0.929  0.288  1.0
  Sm  Sm12  1  0.071  0.536  0.288  1.0
  Sm  Sm13  1  0.464  0.536  0.288  1.0
  Sm  Sm14  1  0.000  0.000  0.782  1.0
  Sm  Sm15  1  0.000  0.000  0.282  1.0
  Ga  Ga16  1  0.836  0.672  0.032  1.0
  Ga  Ga17  1  0.328  0.164  0.032  1.0
  Ga  Ga18  1  0.836  0.164  0.032  1.0
  Ga  Ga19  1  0.164  0.328  0.532  1.0
  Ga  Ga20  1  0.672  0.836  0.532  1.0
  Ga  Ga21  1  0.164  0.836  0.532  1.0
  Co  Co22  1  0.667  0.333  0.560  1.0
  Co  Co23  1  0.333  0.667  0.060  1.0
[/CIF]
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