The compound described by U2Co15Ge2 crystallizes in the hexagonal P6_3/mmc space group. There are two inequivalent U sites. In the first U site, U(1) is bonded in a 18-coordinate geometry to six equivalent Co(2) and twelve equivalent Co(3) atoms. In the second U site, U(2) is bonded in a 20-coordinate geometry to six equivalent Co(1), six equivalent Co(2), six equivalent Co(3), and two equivalent Ge(1) atoms. There are three inequivalent Co sites. In the first Co site, Co(1) is bonded to two equivalent U(2), four equivalent Co(2), four equivalent Co(3), and two equivalent Ge(1) atoms to form distorted CoU2Co8Ge2 cuboctahedra that share corners with four equivalent Co(1)U2Co8Ge2 cuboctahedra, corners with eight equivalent Co(2)U2Co8Ge2 cuboctahedra, corners with ten equivalent Co(3)U3Co8Ge cuboctahedra, edges with four equivalent Co(2)U2Co8Ge2 cuboctahedra, edges with six equivalent Co(3)U3Co8Ge cuboctahedra, faces with four equivalent Co(3)U3Co8Ge cuboctahedra, faces with six equivalent Co(1)U2Co8Ge2 cuboctahedra, and faces with eight equivalent Co(2)U2Co8Ge2 cuboctahedra. In the second Co site, Co(2) is bonded to one U(1), one U(2), two equivalent Co(1), two equivalent Co(2), four equivalent Co(3), and two equivalent Ge(1) atoms to form distorted CoU2Co8Ge2 cuboctahedra that share corners with four equivalent Co(1)U2Co8Ge2 cuboctahedra, corners with eight equivalent Co(3)U3Co8Ge cuboctahedra, corners with twelve equivalent Co(2)U2Co8Ge2 cuboctahedra,  an edgeedge with one Co(2)U2Co8Ge2 cuboctahedra, edges with two equivalent Co(1)U2Co8Ge2 cuboctahedra, edges with two equivalent Co(3)U3Co8Ge cuboctahedra, faces with four equivalent Co(1)U2Co8Ge2 cuboctahedra, faces with seven equivalent Co(2)U2Co8Ge2 cuboctahedra, and faces with ten equivalent Co(3)U3Co8Ge cuboctahedra. In the third Co site, Co(3) is bonded to one U(2), two equivalent U(1), two equivalent Co(1), two equivalent Co(3), four equivalent Co(2), and one Ge(1) atom to form distorted CoU3Co8Ge cuboctahedra that share corners with five equivalent Co(1)U2Co8Ge2 cuboctahedra, corners with eight equivalent Co(2)U2Co8Ge2 cuboctahedra, corners with ten equivalent Co(3)U3Co8Ge cuboctahedra, edges with two equivalent Co(2)U2Co8Ge2 cuboctahedra, edges with three equivalent Co(1)U2Co8Ge2 cuboctahedra, edges with five equivalent Co(3)U3Co8Ge cuboctahedra, faces with two equivalent Co(1)U2Co8Ge2 cuboctahedra, faces with eight equivalent Co(3)U3Co8Ge cuboctahedra, and faces with ten equivalent Co(2)U2Co8Ge2 cuboctahedra. Ge(1) is bonded in a 14-coordinate geometry to one U(2), three equivalent Co(1), three equivalent Co(3), six equivalent Co(2), and one Ge(1) atom. is represented by the CIF card [CIF]
data_U2Co15Ge2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.263
_cell_length_b   8.185
_cell_length_c   8.185
_cell_angle_alpha   120.058
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   479.138
_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
  U  U0  1  0.750  1.000  0.000  1.0
  U  U1  1  0.250  0.000  1.000  1.0
  U  U2  1  0.250  0.667  0.333  1.0
  U  U3  1  0.750  0.333  0.667  1.0
  Co  Co4  1  0.500  0.500  0.000  1.0
  Co  Co5  1  0.500  0.500  0.500  1.0
  Co  Co6  1  0.500  0.000  0.500  1.0
  Co  Co7  1  0.000  0.500  0.000  1.0
  Co  Co8  1  0.000  0.500  0.500  1.0
  Co  Co9  1  0.000  0.000  0.500  1.0
  Co  Co10  1  0.750  0.671  0.024  1.0
  Co  Co11  1  0.750  0.353  0.329  1.0
  Co  Co12  1  0.750  0.976  0.647  1.0
  Co  Co13  1  0.750  0.353  0.024  1.0
  Co  Co14  1  0.750  0.976  0.329  1.0
  Co  Co15  1  0.750  0.671  0.647  1.0
  Co  Co16  1  0.250  0.329  0.976  1.0
  Co  Co17  1  0.250  0.647  0.671  1.0
  Co  Co18  1  0.250  0.024  0.353  1.0
  Co  Co19  1  0.250  0.647  0.976  1.0
  Co  Co20  1  0.250  0.024  0.671  1.0
  Co  Co21  1  0.250  0.329  0.353  1.0
  Co  Co22  1  0.482  0.838  0.675  1.0
  Co  Co23  1  0.482  0.838  0.162  1.0
  Co  Co24  1  0.482  0.325  0.162  1.0
  Co  Co25  1  0.518  0.162  0.325  1.0
  Co  Co26  1  0.518  0.162  0.838  1.0
  Co  Co27  1  0.518  0.675  0.838  1.0
  Co  Co28  1  0.982  0.162  0.325  1.0
  Co  Co29  1  0.982  0.162  0.838  1.0
  Co  Co30  1  0.982  0.675  0.838  1.0
  Co  Co31  1  0.018  0.838  0.675  1.0
  Co  Co32  1  0.018  0.838  0.162  1.0
  Co  Co33  1  0.018  0.325  0.162  1.0
  Ge  Ge34  1  0.601  0.667  0.333  1.0
  Ge  Ge35  1  0.399  0.333  0.667  1.0
  Ge  Ge36  1  0.101  0.333  0.667  1.0
  Ge  Ge37  1  0.899  0.667  0.333  1.0
[/CIF]
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The compound described by U2Co15Ge2 crystallizes in the hexagonal P6_3/mmc space group. There are two inequivalent U sites. In the first U site, U(1) is bonded in a 18-coordinate geometry to six equivalent Co(2) and twelve equivalent Co(3) atoms. In the second U site, U(2) is bonded in a 20-coordinate geometry to six equivalent Co(1), six equivalent Co(2), six equivalent Co(3), and two equivalent Ge(1) atoms. There are three inequivalent Co sites. In the first Co site, Co(1) is bonded to two equivalent U(2), four equivalent Co(2), four equivalent Co(3), and two equivalent Ge(1) atoms to form distorted CoU2Co8Ge2 cuboctahedra that share corners with four equivalent Co(1)U2Co8Ge2 cuboctahedra, corners with eight equivalent Co(2)U2Co8Ge2 cuboctahedra, corners with ten equivalent Co(3)U3Co8Ge cuboctahedra, edges with four equivalent Co(2)U2Co8Ge2 cuboctahedra, edges with six equivalent Co(3)U3Co8Ge cuboctahedra, faces with four equivalent Co(3)U3Co8Ge cuboctahedra, faces with six equivalent Co(1)U2Co8Ge2 cuboctahedra, and faces with eight equivalent Co(2)U2Co8Ge2 cuboctahedra. In the second Co site, Co(2) is bonded to one U(1), one U(2), two equivalent Co(1), two equivalent Co(2), four equivalent Co(3), and two equivalent Ge(1) atoms to form distorted CoU2Co8Ge2 cuboctahedra that share corners with four equivalent Co(1)U2Co8Ge2 cuboctahedra, corners with eight equivalent Co(3)U3Co8Ge cuboctahedra, corners with twelve equivalent Co(2)U2Co8Ge2 cuboctahedra,  an edgeedge with one Co(2)U2Co8Ge2 cuboctahedra, edges with two equivalent Co(1)U2Co8Ge2 cuboctahedra, edges with two equivalent Co(3)U3Co8Ge cuboctahedra, faces with four equivalent Co(1)U2Co8Ge2 cuboctahedra, faces with seven equivalent Co(2)U2Co8Ge2 cuboctahedra, and faces with ten equivalent Co(3)U3Co8Ge cuboctahedra. In the third Co site, Co(3) is bonded to one U(2), two equivalent U(1), two equivalent Co(1), two equivalent Co(3), four equivalent Co(2), and one Ge(1) atom to form distorted CoU3Co8Ge cuboctahedra that share corners with five equivalent Co(1)U2Co8Ge2 cuboctahedra, corners with eight equivalent Co(2)U2Co8Ge2 cuboctahedra, corners with ten equivalent Co(3)U3Co8Ge cuboctahedra, edges with two equivalent Co(2)U2Co8Ge2 cuboctahedra, edges with three equivalent Co(1)U2Co8Ge2 cuboctahedra, edges with five equivalent Co(3)U3Co8Ge cuboctahedra, faces with two equivalent Co(1)U2Co8Ge2 cuboctahedra, faces with eight equivalent Co(3)U3Co8Ge cuboctahedra, and faces with ten equivalent Co(2)U2Co8Ge2 cuboctahedra. Ge(1) is bonded in a 14-coordinate geometry to one U(2), three equivalent Co(1), three equivalent Co(3), six equivalent Co(2), and one Ge(1) atom. is represented by the CIF card [CIF]
data_U2Co15Ge2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.263
_cell_length_b   8.185
_cell_length_c   8.185
_cell_angle_alpha   120.058
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   479.138
_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
  U  U0  1  0.750  1.000  0.000  1.0
  U  U1  1  0.250  0.000  1.000  1.0
  U  U2  1  0.250  0.667  0.333  1.0
  U  U3  1  0.750  0.333  0.667  1.0
  Co  Co4  1  0.500  0.500  0.000  1.0
  Co  Co5  1  0.500  0.500  0.500  1.0
  Co  Co6  1  0.500  0.000  0.500  1.0
  Co  Co7  1  0.000  0.500  0.000  1.0
  Co  Co8  1  0.000  0.500  0.500  1.0
  Co  Co9  1  0.000  0.000  0.500  1.0
  Co  Co10  1  0.750  0.671  0.024  1.0
  Co  Co11  1  0.750  0.353  0.329  1.0
  Co  Co12  1  0.750  0.976  0.647  1.0
  Co  Co13  1  0.750  0.353  0.024  1.0
  Co  Co14  1  0.750  0.976  0.329  1.0
  Co  Co15  1  0.750  0.671  0.647  1.0
  Co  Co16  1  0.250  0.329  0.976  1.0
  Co  Co17  1  0.250  0.647  0.671  1.0
  Co  Co18  1  0.250  0.024  0.353  1.0
  Co  Co19  1  0.250  0.647  0.976  1.0
  Co  Co20  1  0.250  0.024  0.671  1.0
  Co  Co21  1  0.250  0.329  0.353  1.0
  Co  Co22  1  0.482  0.838  0.675  1.0
  Co  Co23  1  0.482  0.838  0.162  1.0
  Co  Co24  1  0.482  0.325  0.162  1.0
  Co  Co25  1  0.518  0.162  0.325  1.0
  Co  Co26  1  0.518  0.162  0.838  1.0
  Co  Co27  1  0.518  0.675  0.838  1.0
  Co  Co28  1  0.982  0.162  0.325  1.0
  Co  Co29  1  0.982  0.162  0.838  1.0
  Co  Co30  1  0.982  0.675  0.838  1.0
  Co  Co31  1  0.018  0.838  0.675  1.0
  Co  Co32  1  0.018  0.838  0.162  1.0
  Co  Co33  1  0.018  0.325  0.162  1.0
  Ge  Ge34  1  0.601  0.667  0.333  1.0
  Ge  Ge35  1  0.399  0.333  0.667  1.0
  Ge  Ge36  1  0.101  0.333  0.667  1.0
  Ge  Ge37  1  0.899  0.667  0.333  1.0
[/CIF]
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