The compound described by Co12Ge4C crystallizes in the tetragonal P4/mmm space group. There are five inequivalent Co sites. In the first Co site, Co(1) is bonded in a single-bond geometry to four equivalent Co(4), four equivalent Ge(1), and one C(1) atom. In the second Co site, Co(2) is bonded to four equivalent Co(4), four equivalent Co(5), and four equivalent Ge(2) atoms to form CoCo8Ge4 cuboctahedra that share corners with eight equivalent Co(2)Co8Ge4 cuboctahedra, edges with four equivalent Ge(1)Co12 cuboctahedra, edges with four equivalent Ge(2)Co12 cuboctahedra, edges with eight equivalent Co(4)Co8Ge4 cuboctahedra, edges with eight equivalent Co(5)Co8Ge4 cuboctahedra, faces with four equivalent Co(4)Co8Ge4 cuboctahedra, faces with four equivalent Co(5)Co8Ge4 cuboctahedra, faces with four equivalent Ge(2)Co12 cuboctahedra, and faces with five equivalent Co(2)Co8Ge4 cuboctahedra. In the third Co site, Co(3) is bonded in a linear geometry to four equivalent Ge(1) and two equivalent C(1) atoms. In the fourth Co site, Co(4) is bonded to two equivalent Co(1), two equivalent Co(2), four equivalent Co(4), two equivalent Ge(1), and two equivalent Ge(2) atoms to form distorted CoCo8Ge4 cuboctahedra that share corners with four equivalent Co(4)Co8Ge4 cuboctahedra, corners with four equivalent Co(5)Co8Ge4 cuboctahedra, corners with two equivalent C(1)Co6 octahedra, edges with four equivalent Co(2)Co8Ge4 cuboctahedra, edges with four equivalent Co(5)Co8Ge4 cuboctahedra, edges with four equivalent Ge(1)Co12 cuboctahedra, edges with four equivalent Ge(2)Co12 cuboctahedra,  a faceface with one Co(5)Co8Ge4 cuboctahedra, faces with two equivalent Co(2)Co8Ge4 cuboctahedra, faces with two equivalent Ge(1)Co12 cuboctahedra, faces with two equivalent Ge(2)Co12 cuboctahedra, and faces with eight equivalent Co(4)Co8Ge4 cuboctahedra. The corner-sharing octahedral tilt angles are 46°. In the fifth Co site, Co(5) is bonded to four equivalent Co(2), four equivalent Co(5), and four equivalent Ge(2) atoms to form CoCo8Ge4 cuboctahedra that share corners with four equivalent Co(5)Co8Ge4 cuboctahedra, corners with eight equivalent Co(4)Co8Ge4 cuboctahedra, edges with eight equivalent Co(2)Co8Ge4 cuboctahedra, edges with eight equivalent Co(4)Co8Ge4 cuboctahedra, edges with eight equivalent Ge(2)Co12 cuboctahedra, faces with two equivalent Co(4)Co8Ge4 cuboctahedra, faces with four equivalent Co(2)Co8Ge4 cuboctahedra, faces with four equivalent Ge(2)Co12 cuboctahedra, and faces with eight equivalent Co(5)Co8Ge4 cuboctahedra. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to four equivalent Co(1), four equivalent Co(3), and four equivalent Co(4) atoms to form GeCo12 cuboctahedra that share corners with four equivalent Ge(2)Co12 cuboctahedra, corners with eight equivalent Ge(1)Co12 cuboctahedra, edges with four equivalent Co(2)Co8Ge4 cuboctahedra, edges with eight equivalent Co(4)Co8Ge4 cuboctahedra,  a faceface with one Ge(2)Co12 cuboctahedra, faces with four equivalent Co(4)Co8Ge4 cuboctahedra, faces with five equivalent Ge(1)Co12 cuboctahedra, and faces with four equivalent C(1)Co6 octahedra. In the second Ge site, Ge(2) is bonded to four equivalent Co(2), four equivalent Co(4), and four equivalent Co(5) atoms to form GeCo12 cuboctahedra that share corners with four equivalent Ge(1)Co12 cuboctahedra, corners with eight equivalent Ge(2)Co12 cuboctahedra, edges with four equivalent Co(2)Co8Ge4 cuboctahedra, edges with eight equivalent Co(4)Co8Ge4 cuboctahedra, edges with eight equivalent Co(5)Co8Ge4 cuboctahedra,  a faceface with one Ge(1)Co12 cuboctahedra, faces with four equivalent Co(2)Co8Ge4 cuboctahedra, faces with four equivalent Co(4)Co8Ge4 cuboctahedra, faces with four equivalent Co(5)Co8Ge4 cuboctahedra, and faces with five equivalent Ge(2)Co12 cuboctahedra. C(1) is bonded to two equivalent Co(1) and four equivalent Co(3) atoms to form CCo6 octahedra that share corners with eight equivalent Co(4)Co8Ge4 cuboctahedra, corners with four equivalent C(1)Co6 octahedra, and faces with eight equivalent Ge(1)Co12 cuboctahedra. The corner-sharing octahedra are not tilted. is represented by the CIF file [CIF]
data_Co12Ge4C
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.654
_cell_length_b   3.654
_cell_length_c   14.137
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   188.763
_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
  Co  Co0  1  0.500  0.500  0.869  1.0
  Co  Co1  1  0.500  0.500  0.131  1.0
  Co  Co2  1  0.500  0.500  0.378  1.0
  Co  Co3  1  0.500  0.500  0.622  1.0
  Co  Co4  1  0.500  0.000  0.000  1.0
  Co  Co5  1  0.500  0.000  0.255  1.0
  Co  Co6  1  0.500  0.000  0.500  1.0
  Co  Co7  1  0.500  0.000  0.745  1.0
  Co  Co8  1  0.000  0.500  0.000  1.0
  Co  Co9  1  0.000  0.500  0.255  1.0
  Co  Co10  1  0.000  0.500  0.500  1.0
  Co  Co11  1  0.000  0.500  0.745  1.0
  Ge  Ge12  1  0.000  0.000  0.863  1.0
  Ge  Ge13  1  0.000  0.000  0.137  1.0
  Ge  Ge14  1  0.000  0.000  0.379  1.0
  Ge  Ge15  1  0.000  0.000  0.621  1.0
  C  C16  1  0.500  0.500  0.000  1.0
[/CIF]
.
The compound described by Co12Ge4C crystallizes in the tetragonal P4/mmm space group. There are five inequivalent Co sites. In the first Co site, Co(1) is bonded in a single-bond geometry to four equivalent Co(4), four equivalent Ge(1), and one C(1) atom. In the second Co site, Co(2) is bonded to four equivalent Co(4), four equivalent Co(5), and four equivalent Ge(2) atoms to form CoCo8Ge4 cuboctahedra that share corners with eight equivalent Co(2)Co8Ge4 cuboctahedra, edges with four equivalent Ge(1)Co12 cuboctahedra, edges with four equivalent Ge(2)Co12 cuboctahedra, edges with eight equivalent Co(4)Co8Ge4 cuboctahedra, edges with eight equivalent Co(5)Co8Ge4 cuboctahedra, faces with four equivalent Co(4)Co8Ge4 cuboctahedra, faces with four equivalent Co(5)Co8Ge4 cuboctahedra, faces with four equivalent Ge(2)Co12 cuboctahedra, and faces with five equivalent Co(2)Co8Ge4 cuboctahedra. In the third Co site, Co(3) is bonded in a linear geometry to four equivalent Ge(1) and two equivalent C(1) atoms. In the fourth Co site, Co(4) is bonded to two equivalent Co(1), two equivalent Co(2), four equivalent Co(4), two equivalent Ge(1), and two equivalent Ge(2) atoms to form distorted CoCo8Ge4 cuboctahedra that share corners with four equivalent Co(4)Co8Ge4 cuboctahedra, corners with four equivalent Co(5)Co8Ge4 cuboctahedra, corners with two equivalent C(1)Co6 octahedra, edges with four equivalent Co(2)Co8Ge4 cuboctahedra, edges with four equivalent Co(5)Co8Ge4 cuboctahedra, edges with four equivalent Ge(1)Co12 cuboctahedra, edges with four equivalent Ge(2)Co12 cuboctahedra,  a faceface with one Co(5)Co8Ge4 cuboctahedra, faces with two equivalent Co(2)Co8Ge4 cuboctahedra, faces with two equivalent Ge(1)Co12 cuboctahedra, faces with two equivalent Ge(2)Co12 cuboctahedra, and faces with eight equivalent Co(4)Co8Ge4 cuboctahedra. The corner-sharing octahedral tilt angles are 46°. In the fifth Co site, Co(5) is bonded to four equivalent Co(2), four equivalent Co(5), and four equivalent Ge(2) atoms to form CoCo8Ge4 cuboctahedra that share corners with four equivalent Co(5)Co8Ge4 cuboctahedra, corners with eight equivalent Co(4)Co8Ge4 cuboctahedra, edges with eight equivalent Co(2)Co8Ge4 cuboctahedra, edges with eight equivalent Co(4)Co8Ge4 cuboctahedra, edges with eight equivalent Ge(2)Co12 cuboctahedra, faces with two equivalent Co(4)Co8Ge4 cuboctahedra, faces with four equivalent Co(2)Co8Ge4 cuboctahedra, faces with four equivalent Ge(2)Co12 cuboctahedra, and faces with eight equivalent Co(5)Co8Ge4 cuboctahedra. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to four equivalent Co(1), four equivalent Co(3), and four equivalent Co(4) atoms to form GeCo12 cuboctahedra that share corners with four equivalent Ge(2)Co12 cuboctahedra, corners with eight equivalent Ge(1)Co12 cuboctahedra, edges with four equivalent Co(2)Co8Ge4 cuboctahedra, edges with eight equivalent Co(4)Co8Ge4 cuboctahedra,  a faceface with one Ge(2)Co12 cuboctahedra, faces with four equivalent Co(4)Co8Ge4 cuboctahedra, faces with five equivalent Ge(1)Co12 cuboctahedra, and faces with four equivalent C(1)Co6 octahedra. In the second Ge site, Ge(2) is bonded to four equivalent Co(2), four equivalent Co(4), and four equivalent Co(5) atoms to form GeCo12 cuboctahedra that share corners with four equivalent Ge(1)Co12 cuboctahedra, corners with eight equivalent Ge(2)Co12 cuboctahedra, edges with four equivalent Co(2)Co8Ge4 cuboctahedra, edges with eight equivalent Co(4)Co8Ge4 cuboctahedra, edges with eight equivalent Co(5)Co8Ge4 cuboctahedra,  a faceface with one Ge(1)Co12 cuboctahedra, faces with four equivalent Co(2)Co8Ge4 cuboctahedra, faces with four equivalent Co(4)Co8Ge4 cuboctahedra, faces with four equivalent Co(5)Co8Ge4 cuboctahedra, and faces with five equivalent Ge(2)Co12 cuboctahedra. C(1) is bonded to two equivalent Co(1) and four equivalent Co(3) atoms to form CCo6 octahedra that share corners with eight equivalent Co(4)Co8Ge4 cuboctahedra, corners with four equivalent C(1)Co6 octahedra, and faces with eight equivalent Ge(1)Co12 cuboctahedra. The corner-sharing octahedra are not tilted. is represented by the CIF file [CIF]
data_Co12Ge4C
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.654
_cell_length_b   3.654
_cell_length_c   14.137
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   188.763
_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
  Co  Co0  1  0.500  0.500  0.869  1.0
  Co  Co1  1  0.500  0.500  0.131  1.0
  Co  Co2  1  0.500  0.500  0.378  1.0
  Co  Co3  1  0.500  0.500  0.622  1.0
  Co  Co4  1  0.500  0.000  0.000  1.0
  Co  Co5  1  0.500  0.000  0.255  1.0
  Co  Co6  1  0.500  0.000  0.500  1.0
  Co  Co7  1  0.500  0.000  0.745  1.0
  Co  Co8  1  0.000  0.500  0.000  1.0
  Co  Co9  1  0.000  0.500  0.255  1.0
  Co  Co10  1  0.000  0.500  0.500  1.0
  Co  Co11  1  0.000  0.500  0.745  1.0
  Ge  Ge12  1  0.000  0.000  0.863  1.0
  Ge  Ge13  1  0.000  0.000  0.137  1.0
  Ge  Ge14  1  0.000  0.000  0.379  1.0
  Ge  Ge15  1  0.000  0.000  0.621  1.0
  C  C16  1  0.500  0.500  0.000  1.0
[/CIF]
.