The compound described by Rh3Ga is beta Cu3Ti-like structured and crystallizes in the tetragonal I4/mmm space group. There are two inequivalent Rh sites. In the first Rh site, Rh(1) is bonded to four equivalent Rh(1), four equivalent Rh(2), and four equivalent Ga(1) atoms to form distorted RhGa4Rh8 cuboctahedra that share corners with twelve equivalent Rh(1)Ga4Rh8 cuboctahedra, edges with eight equivalent Rh(1)Ga4Rh8 cuboctahedra, edges with eight equivalent Rh(2)Ga4Rh8 cuboctahedra, edges with eight equivalent Ga(1)Rh12 cuboctahedra, faces with four equivalent Rh(2)Ga4Rh8 cuboctahedra, faces with four equivalent Ga(1)Rh12 cuboctahedra, and faces with ten equivalent Rh(1)Ga4Rh8 cuboctahedra. In the second Rh site, Rh(2) is bonded to eight equivalent Rh(1) and four equivalent Ga(1) atoms to form RhGa4Rh8 cuboctahedra that share corners with four equivalent Rh(2)Ga4Rh8 cuboctahedra, corners with eight equivalent Ga(1)Rh12 cuboctahedra, edges with eight equivalent Rh(2)Ga4Rh8 cuboctahedra, edges with sixteen equivalent Rh(1)Ga4Rh8 cuboctahedra, faces with four equivalent Rh(2)Ga4Rh8 cuboctahedra, faces with six equivalent Ga(1)Rh12 cuboctahedra, and faces with eight equivalent Rh(1)Ga4Rh8 cuboctahedra. Ga(1) is bonded to four equivalent Rh(2) and eight equivalent Rh(1) atoms to form GaRh12 cuboctahedra that share corners with four equivalent Ga(1)Rh12 cuboctahedra, corners with eight equivalent Rh(2)Ga4Rh8 cuboctahedra, edges with eight equivalent Ga(1)Rh12 cuboctahedra, edges with sixteen equivalent Rh(1)Ga4Rh8 cuboctahedra, faces with four equivalent Ga(1)Rh12 cuboctahedra, faces with six equivalent Rh(2)Ga4Rh8 cuboctahedra, and faces with eight equivalent Rh(1)Ga4Rh8 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_GaRh3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.608
_cell_length_b   4.608
_cell_length_c   4.608
_cell_angle_alpha   130.560
_cell_angle_beta   130.560
_cell_angle_gamma   72.513
_symmetry_Int_Tables_number   1
_cell_volume   55.177
_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
  Ga  Ga0  1  0.000  0.000  0.000  1.0
  Rh  Rh1  1  0.750  0.250  0.500  1.0
  Rh  Rh2  1  0.250  0.750  0.500  1.0
  Rh  Rh3  1  0.500  0.500  0.000  1.0
[/CIF]
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The compound described by Rh3Ga is beta Cu3Ti-like structured and crystallizes in the tetragonal I4/mmm space group. There are two inequivalent Rh sites. In the first Rh site, Rh(1) is bonded to four equivalent Rh(1), four equivalent Rh(2), and four equivalent Ga(1) atoms to form distorted RhGa4Rh8 cuboctahedra that share corners with twelve equivalent Rh(1)Ga4Rh8 cuboctahedra, edges with eight equivalent Rh(1)Ga4Rh8 cuboctahedra, edges with eight equivalent Rh(2)Ga4Rh8 cuboctahedra, edges with eight equivalent Ga(1)Rh12 cuboctahedra, faces with four equivalent Rh(2)Ga4Rh8 cuboctahedra, faces with four equivalent Ga(1)Rh12 cuboctahedra, and faces with ten equivalent Rh(1)Ga4Rh8 cuboctahedra. In the second Rh site, Rh(2) is bonded to eight equivalent Rh(1) and four equivalent Ga(1) atoms to form RhGa4Rh8 cuboctahedra that share corners with four equivalent Rh(2)Ga4Rh8 cuboctahedra, corners with eight equivalent Ga(1)Rh12 cuboctahedra, edges with eight equivalent Rh(2)Ga4Rh8 cuboctahedra, edges with sixteen equivalent Rh(1)Ga4Rh8 cuboctahedra, faces with four equivalent Rh(2)Ga4Rh8 cuboctahedra, faces with six equivalent Ga(1)Rh12 cuboctahedra, and faces with eight equivalent Rh(1)Ga4Rh8 cuboctahedra. Ga(1) is bonded to four equivalent Rh(2) and eight equivalent Rh(1) atoms to form GaRh12 cuboctahedra that share corners with four equivalent Ga(1)Rh12 cuboctahedra, corners with eight equivalent Rh(2)Ga4Rh8 cuboctahedra, edges with eight equivalent Ga(1)Rh12 cuboctahedra, edges with sixteen equivalent Rh(1)Ga4Rh8 cuboctahedra, faces with four equivalent Ga(1)Rh12 cuboctahedra, faces with six equivalent Rh(2)Ga4Rh8 cuboctahedra, and faces with eight equivalent Rh(1)Ga4Rh8 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_GaRh3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.608
_cell_length_b   4.608
_cell_length_c   4.608
_cell_angle_alpha   130.560
_cell_angle_beta   130.560
_cell_angle_gamma   72.513
_symmetry_Int_Tables_number   1
_cell_volume   55.177
_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
  Ga  Ga0  1  0.000  0.000  0.000  1.0
  Rh  Rh1  1  0.750  0.250  0.500  1.0
  Rh  Rh2  1  0.250  0.750  0.500  1.0
  Rh  Rh3  1  0.500  0.500  0.000  1.0
[/CIF]
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