The structure described by SmNiGa3 crystallizes in the tetragonal I-4m2 space group. Sm(1) is bonded in a 16-coordinate geometry to four equivalent Ni(1), four equivalent Ga(2), and eight equivalent Ga(1) atoms. Ni(1) is bonded to four equivalent Sm(1), four equivalent Ga(1), and four equivalent Ga(2) atoms to form distorted NiSm4Ga8 cuboctahedra that share corners with four equivalent Ga(2)Sm4Ga4Ni4 cuboctahedra, corners with twelve equivalent Ni(1)Sm4Ga8 cuboctahedra, edges with two equivalent Ga(2)Sm4Ga4Ni4 cuboctahedra, faces with four equivalent Ni(1)Sm4Ga8 cuboctahedra, and faces with four equivalent Ga(2)Sm4Ga4Ni4 cuboctahedra. There are two inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a 9-coordinate geometry to four equivalent Sm(1), two equivalent Ni(1), one Ga(1), and two equivalent Ga(2) atoms. In the second Ga site, Ga(2) is bonded to four equivalent Sm(1), four equivalent Ni(1), and four equivalent Ga(1) atoms to form GaSm4Ga4Ni4 cuboctahedra that share corners with four equivalent Ni(1)Sm4Ga8 cuboctahedra, corners with twelve equivalent Ga(2)Sm4Ga4Ni4 cuboctahedra, edges with two equivalent Ni(1)Sm4Ga8 cuboctahedra, faces with four equivalent Ni(1)Sm4Ga8 cuboctahedra, and faces with four equivalent Ga(2)Sm4Ga4Ni4 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_SmGa3Ni
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.047
_cell_length_b   6.047
_cell_length_c   6.047
_cell_angle_alpha   140.379
_cell_angle_beta   140.379
_cell_angle_gamma   57.278
_symmetry_Int_Tables_number   1
_cell_volume   89.147
_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
  Sm  Sm0  1  0.000  0.000  0.000  1.0
  Ga  Ga1  1  0.617  0.617  0.000  1.0
  Ga  Ga2  1  0.383  0.383  0.000  1.0
  Ga  Ga3  1  0.750  0.250  0.500  1.0
  Ni  Ni4  1  0.250  0.750  0.500  1.0
[/CIF]
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The structure described by SmNiGa3 crystallizes in the tetragonal I-4m2 space group. Sm(1) is bonded in a 16-coordinate geometry to four equivalent Ni(1), four equivalent Ga(2), and eight equivalent Ga(1) atoms. Ni(1) is bonded to four equivalent Sm(1), four equivalent Ga(1), and four equivalent Ga(2) atoms to form distorted NiSm4Ga8 cuboctahedra that share corners with four equivalent Ga(2)Sm4Ga4Ni4 cuboctahedra, corners with twelve equivalent Ni(1)Sm4Ga8 cuboctahedra, edges with two equivalent Ga(2)Sm4Ga4Ni4 cuboctahedra, faces with four equivalent Ni(1)Sm4Ga8 cuboctahedra, and faces with four equivalent Ga(2)Sm4Ga4Ni4 cuboctahedra. There are two inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a 9-coordinate geometry to four equivalent Sm(1), two equivalent Ni(1), one Ga(1), and two equivalent Ga(2) atoms. In the second Ga site, Ga(2) is bonded to four equivalent Sm(1), four equivalent Ni(1), and four equivalent Ga(1) atoms to form GaSm4Ga4Ni4 cuboctahedra that share corners with four equivalent Ni(1)Sm4Ga8 cuboctahedra, corners with twelve equivalent Ga(2)Sm4Ga4Ni4 cuboctahedra, edges with two equivalent Ni(1)Sm4Ga8 cuboctahedra, faces with four equivalent Ni(1)Sm4Ga8 cuboctahedra, and faces with four equivalent Ga(2)Sm4Ga4Ni4 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_SmGa3Ni
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.047
_cell_length_b   6.047
_cell_length_c   6.047
_cell_angle_alpha   140.379
_cell_angle_beta   140.379
_cell_angle_gamma   57.278
_symmetry_Int_Tables_number   1
_cell_volume   89.147
_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
  Sm  Sm0  1  0.000  0.000  0.000  1.0
  Ga  Ga1  1  0.617  0.617  0.000  1.0
  Ga  Ga2  1  0.383  0.383  0.000  1.0
  Ga  Ga3  1  0.750  0.250  0.500  1.0
  Ni  Ni4  1  0.250  0.750  0.500  1.0
[/CIF]
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