The compound described by U3Tb(CoGe)8 crystallizes in the tetragonal P4/mmm space group. There are two inequivalent U sites. In the first U site, U(1) is bonded in a 16-coordinate geometry to four equivalent Co(1), four equivalent Co(2), four equivalent Ge(2), and four equivalent Ge(4) atoms. In the second U site, U(2) is bonded in a 16-coordinate geometry to eight equivalent Co(2) and eight equivalent Ge(3) atoms. Tb(1) is bonded in a 16-coordinate geometry to eight equivalent Co(1) and eight equivalent Ge(1) atoms. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to two equivalent U(1), two equivalent Tb(1), two equivalent Ge(1), and two equivalent Ge(4) atoms to form distorted CoTb2U2Ge4 tetrahedra that share corners with six equivalent Co(1)Tb2U2Ge4 tetrahedra, corners with six equivalent Co(2)U4Ge4 tetrahedra,  an edgeedge with one Co(2)U4Ge4 tetrahedra, edges with five equivalent Co(1)Tb2U2Ge4 tetrahedra, and faces with four equivalent Co(1)Tb2U2Ge4 tetrahedra. In the second Co site, Co(2) is bonded to two equivalent U(1), two equivalent U(2), two equivalent Ge(2), and two equivalent Ge(3) atoms to form distorted CoU4Ge4 tetrahedra that share corners with six equivalent Co(1)Tb2U2Ge4 tetrahedra, corners with six equivalent Co(2)U4Ge4 tetrahedra,  an edgeedge with one Co(1)Tb2U2Ge4 tetrahedra, edges with five equivalent Co(2)U4Ge4 tetrahedra, and faces with four equivalent Co(2)U4Ge4 tetrahedra. There are four inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 9-coordinate geometry to four equivalent Tb(1), four equivalent Co(1), and one Ge(1) atom. In the second Ge site, Ge(2) is bonded in a 9-coordinate geometry to four equivalent U(1), four equivalent Co(2), and one Ge(4) atom. In the third Ge site, Ge(3) is bonded in a 9-coordinate geometry to four equivalent U(2), four equivalent Co(2), and one Ge(3) atom. In the fourth Ge site, Ge(4) is bonded in a 9-coordinate geometry to four equivalent U(1), four equivalent Co(1), and one Ge(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_TbU3(CoGe)8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.017
_cell_length_b   4.017
_cell_length_c   19.678
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   317.535
_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
  Tb  Tb0  1  0.000  0.000  0.000  1.0
  U  U1  1  0.500  0.500  0.251  1.0
  U  U2  1  0.000  0.000  0.500  1.0
  U  U3  1  0.500  0.500  0.749  1.0
  Co  Co4  1  0.000  0.500  0.127  1.0
  Co  Co5  1  0.500  0.000  0.375  1.0
  Co  Co6  1  0.000  0.500  0.625  1.0
  Co  Co7  1  0.500  0.000  0.873  1.0
  Co  Co8  1  0.500  0.000  0.127  1.0
  Co  Co9  1  0.000  0.500  0.375  1.0
  Co  Co10  1  0.500  0.000  0.625  1.0
  Co  Co11  1  0.000  0.500  0.873  1.0
  Ge  Ge12  1  0.500  0.500  0.065  1.0
  Ge  Ge13  1  0.000  0.000  0.314  1.0
  Ge  Ge14  1  0.500  0.500  0.564  1.0
  Ge  Ge15  1  0.000  0.000  0.814  1.0
  Ge  Ge16  1  0.000  0.000  0.186  1.0
  Ge  Ge17  1  0.500  0.500  0.436  1.0
  Ge  Ge18  1  0.000  0.000  0.686  1.0
  Ge  Ge19  1  0.500  0.500  0.935  1.0
[/CIF]
.
The compound described by U3Tb(CoGe)8 crystallizes in the tetragonal P4/mmm space group. There are two inequivalent U sites. In the first U site, U(1) is bonded in a 16-coordinate geometry to four equivalent Co(1), four equivalent Co(2), four equivalent Ge(2), and four equivalent Ge(4) atoms. In the second U site, U(2) is bonded in a 16-coordinate geometry to eight equivalent Co(2) and eight equivalent Ge(3) atoms. Tb(1) is bonded in a 16-coordinate geometry to eight equivalent Co(1) and eight equivalent Ge(1) atoms. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to two equivalent U(1), two equivalent Tb(1), two equivalent Ge(1), and two equivalent Ge(4) atoms to form distorted CoTb2U2Ge4 tetrahedra that share corners with six equivalent Co(1)Tb2U2Ge4 tetrahedra, corners with six equivalent Co(2)U4Ge4 tetrahedra,  an edgeedge with one Co(2)U4Ge4 tetrahedra, edges with five equivalent Co(1)Tb2U2Ge4 tetrahedra, and faces with four equivalent Co(1)Tb2U2Ge4 tetrahedra. In the second Co site, Co(2) is bonded to two equivalent U(1), two equivalent U(2), two equivalent Ge(2), and two equivalent Ge(3) atoms to form distorted CoU4Ge4 tetrahedra that share corners with six equivalent Co(1)Tb2U2Ge4 tetrahedra, corners with six equivalent Co(2)U4Ge4 tetrahedra,  an edgeedge with one Co(1)Tb2U2Ge4 tetrahedra, edges with five equivalent Co(2)U4Ge4 tetrahedra, and faces with four equivalent Co(2)U4Ge4 tetrahedra. There are four inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 9-coordinate geometry to four equivalent Tb(1), four equivalent Co(1), and one Ge(1) atom. In the second Ge site, Ge(2) is bonded in a 9-coordinate geometry to four equivalent U(1), four equivalent Co(2), and one Ge(4) atom. In the third Ge site, Ge(3) is bonded in a 9-coordinate geometry to four equivalent U(2), four equivalent Co(2), and one Ge(3) atom. In the fourth Ge site, Ge(4) is bonded in a 9-coordinate geometry to four equivalent U(1), four equivalent Co(1), and one Ge(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_TbU3(CoGe)8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.017
_cell_length_b   4.017
_cell_length_c   19.678
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   317.535
_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
  Tb  Tb0  1  0.000  0.000  0.000  1.0
  U  U1  1  0.500  0.500  0.251  1.0
  U  U2  1  0.000  0.000  0.500  1.0
  U  U3  1  0.500  0.500  0.749  1.0
  Co  Co4  1  0.000  0.500  0.127  1.0
  Co  Co5  1  0.500  0.000  0.375  1.0
  Co  Co6  1  0.000  0.500  0.625  1.0
  Co  Co7  1  0.500  0.000  0.873  1.0
  Co  Co8  1  0.500  0.000  0.127  1.0
  Co  Co9  1  0.000  0.500  0.375  1.0
  Co  Co10  1  0.500  0.000  0.625  1.0
  Co  Co11  1  0.000  0.500  0.873  1.0
  Ge  Ge12  1  0.500  0.500  0.065  1.0
  Ge  Ge13  1  0.000  0.000  0.314  1.0
  Ge  Ge14  1  0.500  0.500  0.564  1.0
  Ge  Ge15  1  0.000  0.000  0.814  1.0
  Ge  Ge16  1  0.000  0.000  0.186  1.0
  Ge  Ge17  1  0.500  0.500  0.436  1.0
  Ge  Ge18  1  0.000  0.000  0.686  1.0
  Ge  Ge19  1  0.500  0.500  0.935  1.0
[/CIF]
.