The crystal structure described by TbCo3Ga2 crystallizes in the orthorhombic Cmmm space group. There are two inequivalent Tb sites. In the first Tb site, Tb(1) is bonded in a 18-coordinate geometry to two equivalent Co(1), two equivalent Co(4), four equivalent Co(2), four equivalent Co(3), two equivalent Ga(2), and four equivalent Ga(1) atoms. In the second Tb site, Tb(2) is bonded in a 18-coordinate geometry to two equivalent Co(1), four equivalent Co(2), four equivalent Ga(2), and eight equivalent Ga(1) atoms. There are four inequivalent Co sites. In the first Co site, Co(1) is bonded in a 9-coordinate geometry to one Tb(2), two equivalent Tb(1), two equivalent Co(4), and four equivalent Ga(1) atoms. In the second Co site, Co(2) is bonded in a 9-coordinate geometry to one Tb(2), two equivalent Tb(1), two equivalent Co(3), two equivalent Ga(1), and two equivalent Ga(2) atoms. In the third Co site, Co(3) is bonded to four equivalent Tb(1), four equivalent Co(2), two equivalent Ga(1), and two equivalent Ga(2) atoms to form distorted CoTb4Ga4Co4 cuboctahedra that share corners with four equivalent Co(3)Tb4Ga4Co4 cuboctahedra, corners with four equivalent Co(4)Tb4Ga4Co4 cuboctahedra, corners with eight equivalent Ga(1)Tb4Ga2Co6 cuboctahedra, edges with four equivalent Ga(2)Tb4Ga2Co6 cuboctahedra, edges with six equivalent Ga(1)Tb4Ga2Co6 cuboctahedra, faces with two equivalent Co(4)Tb4Ga4Co4 cuboctahedra, faces with two equivalent Ga(1)Tb4Ga2Co6 cuboctahedra, faces with two equivalent Ga(2)Tb4Ga2Co6 cuboctahedra, and faces with four equivalent Co(3)Tb4Ga4Co4 cuboctahedra. In the fourth Co site, Co(4) is bonded to four equivalent Tb(1), four equivalent Co(1), and four equivalent Ga(1) atoms to form distorted CoTb4Ga4Co4 cuboctahedra that share corners with eight equivalent Co(3)Tb4Ga4Co4 cuboctahedra, corners with eight equivalent Ga(2)Tb4Ga2Co6 cuboctahedra, edges with two equivalent Ga(2)Tb4Ga2Co6 cuboctahedra, edges with eight equivalent Ga(1)Tb4Ga2Co6 cuboctahedra, faces with two equivalent Co(4)Tb4Ga4Co4 cuboctahedra, faces with four equivalent Co(3)Tb4Ga4Co4 cuboctahedra, and faces with four equivalent Ga(1)Tb4Ga2Co6 cuboctahedra. There are two inequivalent Ga sites. In the first Ga site, Ga(1) is bonded to two equivalent Tb(1), two equivalent Tb(2), one Co(3), one Co(4), two equivalent Co(1), two equivalent Co(2), one Ga(1), and one Ga(2) atom to form distorted GaTb4Ga2Co6 cuboctahedra that share corners with four equivalent Co(3)Tb4Ga4Co4 cuboctahedra, corners with four equivalent Ga(2)Tb4Ga2Co6 cuboctahedra, corners with eight equivalent Ga(1)Tb4Ga2Co6 cuboctahedra, edges with two equivalent Co(4)Tb4Ga4Co4 cuboctahedra, edges with two equivalent Ga(2)Tb4Ga2Co6 cuboctahedra, edges with three equivalent Co(3)Tb4Ga4Co4 cuboctahedra, edges with three equivalent Ga(1)Tb4Ga2Co6 cuboctahedra,  a faceface with one Co(3)Tb4Ga4Co4 cuboctahedra,  a faceface with one Co(4)Tb4Ga4Co4 cuboctahedra, faces with three equivalent Ga(2)Tb4Ga2Co6 cuboctahedra, and faces with five equivalent Ga(1)Tb4Ga2Co6 cuboctahedra. In the second Ga site, Ga(2) is bonded to two equivalent Tb(1), two equivalent Tb(2), two equivalent Co(3), four equivalent Co(2), and two equivalent Ga(1) atoms to form distorted GaTb4Ga2Co6 cuboctahedra that share corners with four equivalent Co(4)Tb4Ga4Co4 cuboctahedra, corners with four equivalent Ga(2)Tb4Ga2Co6 cuboctahedra, corners with eight equivalent Ga(1)Tb4Ga2Co6 cuboctahedra,  an edgeedge with one Co(4)Tb4Ga4Co4 cuboctahedra,  an edgeedge with one Ga(2)Tb4Ga2Co6 cuboctahedra, edges with four equivalent Co(3)Tb4Ga4Co4 cuboctahedra, edges with four equivalent Ga(1)Tb4Ga2Co6 cuboctahedra, faces with two equivalent Co(3)Tb4Ga4Co4 cuboctahedra, faces with two equivalent Ga(2)Tb4Ga2Co6 cuboctahedra, and faces with six equivalent Ga(1)Tb4Ga2Co6 cuboctahedra. is represented by the CIF file [CIF]
data_TbGa2Co3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.036
_cell_length_b   8.790
_cell_length_c   8.794
_cell_angle_alpha   120.116
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   269.850
_cell_formula_units_Z   3
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
  Tb  Tb0  1  0.000  0.333  0.667  1.0
  Tb  Tb1  1  0.000  0.667  0.334  1.0
  Tb  Tb2  1  0.000  1.000  1.000  1.0
  Ga  Ga3  1  0.500  0.492  0.985  1.0
  Ga  Ga4  1  0.500  0.492  0.508  1.0
  Ga  Ga5  1  0.500  0.015  0.508  1.0
  Ga  Ga6  1  0.500  0.841  0.682  1.0
  Ga  Ga7  1  0.500  0.318  0.159  1.0
  Ga  Ga8  1  0.500  0.841  0.159  1.0
  Co  Co9  1  0.000  0.323  0.989  1.0
  Co  Co10  1  0.000  0.667  0.676  1.0
  Co  Co11  1  0.000  0.010  0.333  1.0
  Co  Co12  1  0.000  0.667  0.990  1.0
  Co  Co13  1  0.000  0.323  0.333  1.0
  Co  Co14  1  0.000  0.010  0.677  1.0
  Co  Co15  1  0.500  0.167  0.333  1.0
  Co  Co16  1  0.500  0.167  0.833  1.0
  Co  Co17  1  0.500  0.667  0.833  1.0
[/CIF]
.
The crystal structure described by TbCo3Ga2 crystallizes in the orthorhombic Cmmm space group. There are two inequivalent Tb sites. In the first Tb site, Tb(1) is bonded in a 18-coordinate geometry to two equivalent Co(1), two equivalent Co(4), four equivalent Co(2), four equivalent Co(3), two equivalent Ga(2), and four equivalent Ga(1) atoms. In the second Tb site, Tb(2) is bonded in a 18-coordinate geometry to two equivalent Co(1), four equivalent Co(2), four equivalent Ga(2), and eight equivalent Ga(1) atoms. There are four inequivalent Co sites. In the first Co site, Co(1) is bonded in a 9-coordinate geometry to one Tb(2), two equivalent Tb(1), two equivalent Co(4), and four equivalent Ga(1) atoms. In the second Co site, Co(2) is bonded in a 9-coordinate geometry to one Tb(2), two equivalent Tb(1), two equivalent Co(3), two equivalent Ga(1), and two equivalent Ga(2) atoms. In the third Co site, Co(3) is bonded to four equivalent Tb(1), four equivalent Co(2), two equivalent Ga(1), and two equivalent Ga(2) atoms to form distorted CoTb4Ga4Co4 cuboctahedra that share corners with four equivalent Co(3)Tb4Ga4Co4 cuboctahedra, corners with four equivalent Co(4)Tb4Ga4Co4 cuboctahedra, corners with eight equivalent Ga(1)Tb4Ga2Co6 cuboctahedra, edges with four equivalent Ga(2)Tb4Ga2Co6 cuboctahedra, edges with six equivalent Ga(1)Tb4Ga2Co6 cuboctahedra, faces with two equivalent Co(4)Tb4Ga4Co4 cuboctahedra, faces with two equivalent Ga(1)Tb4Ga2Co6 cuboctahedra, faces with two equivalent Ga(2)Tb4Ga2Co6 cuboctahedra, and faces with four equivalent Co(3)Tb4Ga4Co4 cuboctahedra. In the fourth Co site, Co(4) is bonded to four equivalent Tb(1), four equivalent Co(1), and four equivalent Ga(1) atoms to form distorted CoTb4Ga4Co4 cuboctahedra that share corners with eight equivalent Co(3)Tb4Ga4Co4 cuboctahedra, corners with eight equivalent Ga(2)Tb4Ga2Co6 cuboctahedra, edges with two equivalent Ga(2)Tb4Ga2Co6 cuboctahedra, edges with eight equivalent Ga(1)Tb4Ga2Co6 cuboctahedra, faces with two equivalent Co(4)Tb4Ga4Co4 cuboctahedra, faces with four equivalent Co(3)Tb4Ga4Co4 cuboctahedra, and faces with four equivalent Ga(1)Tb4Ga2Co6 cuboctahedra. There are two inequivalent Ga sites. In the first Ga site, Ga(1) is bonded to two equivalent Tb(1), two equivalent Tb(2), one Co(3), one Co(4), two equivalent Co(1), two equivalent Co(2), one Ga(1), and one Ga(2) atom to form distorted GaTb4Ga2Co6 cuboctahedra that share corners with four equivalent Co(3)Tb4Ga4Co4 cuboctahedra, corners with four equivalent Ga(2)Tb4Ga2Co6 cuboctahedra, corners with eight equivalent Ga(1)Tb4Ga2Co6 cuboctahedra, edges with two equivalent Co(4)Tb4Ga4Co4 cuboctahedra, edges with two equivalent Ga(2)Tb4Ga2Co6 cuboctahedra, edges with three equivalent Co(3)Tb4Ga4Co4 cuboctahedra, edges with three equivalent Ga(1)Tb4Ga2Co6 cuboctahedra,  a faceface with one Co(3)Tb4Ga4Co4 cuboctahedra,  a faceface with one Co(4)Tb4Ga4Co4 cuboctahedra, faces with three equivalent Ga(2)Tb4Ga2Co6 cuboctahedra, and faces with five equivalent Ga(1)Tb4Ga2Co6 cuboctahedra. In the second Ga site, Ga(2) is bonded to two equivalent Tb(1), two equivalent Tb(2), two equivalent Co(3), four equivalent Co(2), and two equivalent Ga(1) atoms to form distorted GaTb4Ga2Co6 cuboctahedra that share corners with four equivalent Co(4)Tb4Ga4Co4 cuboctahedra, corners with four equivalent Ga(2)Tb4Ga2Co6 cuboctahedra, corners with eight equivalent Ga(1)Tb4Ga2Co6 cuboctahedra,  an edgeedge with one Co(4)Tb4Ga4Co4 cuboctahedra,  an edgeedge with one Ga(2)Tb4Ga2Co6 cuboctahedra, edges with four equivalent Co(3)Tb4Ga4Co4 cuboctahedra, edges with four equivalent Ga(1)Tb4Ga2Co6 cuboctahedra, faces with two equivalent Co(3)Tb4Ga4Co4 cuboctahedra, faces with two equivalent Ga(2)Tb4Ga2Co6 cuboctahedra, and faces with six equivalent Ga(1)Tb4Ga2Co6 cuboctahedra. is represented by the CIF file [CIF]
data_TbGa2Co3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.036
_cell_length_b   8.790
_cell_length_c   8.794
_cell_angle_alpha   120.116
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   269.850
_cell_formula_units_Z   3
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
  Tb  Tb0  1  0.000  0.333  0.667  1.0
  Tb  Tb1  1  0.000  0.667  0.334  1.0
  Tb  Tb2  1  0.000  1.000  1.000  1.0
  Ga  Ga3  1  0.500  0.492  0.985  1.0
  Ga  Ga4  1  0.500  0.492  0.508  1.0
  Ga  Ga5  1  0.500  0.015  0.508  1.0
  Ga  Ga6  1  0.500  0.841  0.682  1.0
  Ga  Ga7  1  0.500  0.318  0.159  1.0
  Ga  Ga8  1  0.500  0.841  0.159  1.0
  Co  Co9  1  0.000  0.323  0.989  1.0
  Co  Co10  1  0.000  0.667  0.676  1.0
  Co  Co11  1  0.000  0.010  0.333  1.0
  Co  Co12  1  0.000  0.667  0.990  1.0
  Co  Co13  1  0.000  0.323  0.333  1.0
  Co  Co14  1  0.000  0.010  0.677  1.0
  Co  Co15  1  0.500  0.167  0.333  1.0
  Co  Co16  1  0.500  0.167  0.833  1.0
  Co  Co17  1  0.500  0.667  0.833  1.0
[/CIF]
.