The material described by Ta6Cr3Co3C2 crystallizes in the orthorhombic Imm2 space group. There are six inequivalent Ta sites. In the first Ta site, Ta(1) is bonded in a 2-coordinate geometry to two equivalent Cr(2), two equivalent Cr(3), two equivalent Co(3), and two equivalent C(1) atoms. In the second Ta site, Ta(2) is bonded in a 2-coordinate geometry to two equivalent Cr(1), two equivalent Co(1), two equivalent Co(2), and two equivalent C(2) atoms. In the third Ta site, Ta(3) is bonded in a 2-coordinate geometry to one Cr(1), one Cr(2), one Cr(3), one Co(1), one Co(2), one Co(3), one C(1), and one C(2) atom. In the fourth Ta site, Ta(4) is bonded in a 2-coordinate geometry to two equivalent Cr(2), two equivalent Co(1), two equivalent Co(2), and two equivalent C(1) atoms. In the fifth Ta site, Ta(5) is bonded in a distorted bent 150 degrees geometry to two equivalent Cr(1), two equivalent Cr(3), two equivalent Co(3), and two equivalent C(2) atoms. In the sixth Ta site, Ta(6) is bonded in a 2-coordinate geometry to one Cr(1), one Cr(2), one Cr(3), one Co(1), one Co(2), one Co(3), one C(1), and one C(2) atom. There are three inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to one Ta(2), one Ta(5), two equivalent Ta(3), two equivalent Ta(6), one Cr(3), one Co(2), two equivalent Co(1), and two equivalent Co(3) atoms to form distorted CrTa6CrCo5 cuboctahedra that share corners with three equivalent Cr(3)Ta6Cr4Co2 cuboctahedra, corners with three equivalent Co(2)Ta6Cr3Co3 cuboctahedra, edges with two equivalent C(1)Ta6 octahedra, edges with four equivalent C(2)Ta6 octahedra, faces with two equivalent Cr(3)Ta6Cr4Co2 cuboctahedra, faces with two equivalent Cr(1)Ta6CrCo5 cuboctahedra, faces with two equivalent Co(2)Ta6Cr3Co3 cuboctahedra, and faces with four equivalent Cr(2)Ta6Cr2Co4 cuboctahedra. In the second Cr site, Cr(2) is bonded to one Ta(1), one Ta(4), two equivalent Ta(3), two equivalent Ta(6), two equivalent Cr(3), one Co(1), one Co(3), and two equivalent Co(2) atoms to form distorted CrTa6Cr2Co4 cuboctahedra that share edges with two equivalent C(2)Ta6 octahedra, edges with four equivalent C(1)Ta6 octahedra, faces with two equivalent Cr(2)Ta6Cr2Co4 cuboctahedra, faces with two equivalent Cr(3)Ta6Cr4Co2 cuboctahedra, faces with two equivalent Co(2)Ta6Cr3Co3 cuboctahedra, and faces with four equivalent Cr(1)Ta6CrCo5 cuboctahedra. In the third Cr site, Cr(3) is bonded to one Ta(1), one Ta(5), two equivalent Ta(3), two equivalent Ta(6), one Cr(1), one Cr(3), two equivalent Cr(2), and two equivalent Co(1) atoms to form distorted CrTa6Cr4Co2 cuboctahedra that share  a cornercorner with one Cr(3)Ta6Cr4Co2 cuboctahedra, corners with three equivalent Cr(1)Ta6CrCo5 cuboctahedra, corners with three equivalent Co(2)Ta6Cr3Co3 cuboctahedra, corners with three equivalent C(1)Ta6 octahedra,  a faceface with one Cr(3)Ta6Cr4Co2 cuboctahedra, faces with two equivalent Cr(2)Ta6Cr2Co4 cuboctahedra, faces with two equivalent Cr(1)Ta6CrCo5 cuboctahedra, faces with two equivalent Co(2)Ta6Cr3Co3 cuboctahedra,  a faceface with one C(1)Ta6 octahedra, and faces with two equivalent C(2)Ta6 octahedra. The corner-sharing octahedral tilt angles range from 42-43°. There are three inequivalent Co sites. In the first Co site, Co(1) is bonded in a 12-coordinate geometry to one Ta(2), one Ta(4), two equivalent Ta(3), two equivalent Ta(6), one Cr(2), two equivalent Cr(1), two equivalent Cr(3), and one Co(1) atom. In the second Co site, Co(2) is bonded to one Ta(2), one Ta(4), two equivalent Ta(3), two equivalent Ta(6), one Cr(1), two equivalent Cr(2), one Co(2), and two equivalent Co(3) atoms to form distorted CoTa6Cr3Co3 cuboctahedra that share  a cornercorner with one Co(2)Ta6Cr3Co3 cuboctahedra, corners with three equivalent Cr(3)Ta6Cr4Co2 cuboctahedra, corners with three equivalent Cr(1)Ta6CrCo5 cuboctahedra, corners with three equivalent C(1)Ta6 octahedra,  a faceface with one Co(2)Ta6Cr3Co3 cuboctahedra, faces with two equivalent Cr(2)Ta6Cr2Co4 cuboctahedra, faces with two equivalent Cr(3)Ta6Cr4Co2 cuboctahedra, faces with two equivalent Cr(1)Ta6CrCo5 cuboctahedra,  a faceface with one C(1)Ta6 octahedra, and faces with two equivalent C(2)Ta6 octahedra. The corner-sharing octahedral tilt angles are 43°. In the third Co site, Co(3) is bonded in a 12-coordinate geometry to one Ta(1), one Ta(5), two equivalent Ta(3), two equivalent Ta(6), one Cr(2), two equivalent Cr(1), one Co(3), and two equivalent Co(2) atoms. There are two inequivalent C sites. In the first C site, C(1) is bonded to one Ta(1), one Ta(4), two equivalent Ta(3), and two equivalent Ta(6) atoms to form CTa6 octahedra that share corners with three equivalent Cr(3)Ta6Cr4Co2 cuboctahedra, corners with three equivalent Co(2)Ta6Cr3Co3 cuboctahedra, corners with two equivalent C(1)Ta6 octahedra, corners with four equivalent C(2)Ta6 octahedra, edges with two equivalent Cr(1)Ta6CrCo5 cuboctahedra, edges with four equivalent Cr(2)Ta6Cr2Co4 cuboctahedra,  a faceface with one Cr(3)Ta6Cr4Co2 cuboctahedra, and  a faceface with one Co(2)Ta6Cr3Co3 cuboctahedra. The corner-sharing octahedral tilt angles range from 43-44°. In the second C site, C(2) is bonded to one Ta(2), one Ta(5), two equivalent Ta(3), and two equivalent Ta(6) atoms to form CTa6 octahedra that share corners with two equivalent C(2)Ta6 octahedra, corners with four equivalent C(1)Ta6 octahedra, edges with two equivalent Cr(2)Ta6Cr2Co4 cuboctahedra, edges with four equivalent Cr(1)Ta6CrCo5 cuboctahedra, faces with two equivalent Cr(3)Ta6Cr4Co2 cuboctahedra, and faces with two equivalent Co(2)Ta6Cr3Co3 cuboctahedra. The corner-sharing octahedral tilt angles range from 43-44°. is represented by the CIF card [CIF]
data_Ta6Cr3Co3C2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.070
_cell_length_b   8.070
_cell_length_c   8.070
_cell_angle_alpha   120.159
_cell_angle_beta   119.900
_cell_angle_gamma   89.950
_symmetry_Int_Tables_number   1
_cell_volume   371.484
_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
  Ta  Ta0  1  0.572  0.072  0.500  1.0
  Ta  Ta1  1  0.179  0.679  0.500  1.0
  Ta  Ta2  1  0.179  0.070  0.500  1.0
  Ta  Ta3  1  0.570  0.679  0.500  1.0
  Ta  Ta4  1  0.570  0.070  0.891  1.0
  Ta  Ta5  1  0.179  0.679  0.109  1.0
  Ta  Ta6  1  0.930  0.930  0.000  1.0
  Ta  Ta7  1  0.320  0.320  0.000  1.0
  Ta  Ta8  1  0.319  0.930  1.000  1.0
  Ta  Ta9  1  0.930  0.319  0.000  1.0
  Ta  Ta10  1  0.930  0.930  0.611  1.0
  Ta  Ta11  1  0.319  0.319  0.389  1.0
  Cr  Cr12  1  0.751  0.503  0.249  1.0
  Cr  Cr13  1  0.254  0.503  0.751  1.0
  Cr  Cr14  1  0.749  0.502  0.753  1.0
  Cr  Cr15  1  0.749  0.996  0.247  1.0
  Cr  Cr16  1  0.953  0.299  0.654  1.0
  Cr  Cr17  1  0.645  0.299  0.346  1.0
  Co  Co18  1  0.954  0.299  0.345  1.0
  Co  Co19  1  0.954  0.609  0.655  1.0
  Co  Co20  1  0.549  0.701  0.848  1.0
  Co  Co21  1  0.853  0.701  0.152  1.0
  Co  Co22  1  0.548  0.702  0.154  1.0
  Co  Co23  1  0.548  0.393  0.846  1.0
  C  C24  1  0.249  1.000  0.250  1.0
  C  C25  1  0.750  1.000  0.750  1.0
  C  C26  1  0.250  0.999  0.749  1.0
  C  C27  1  0.250  0.500  0.251  1.0
[/CIF]
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The material described by Ta6Cr3Co3C2 crystallizes in the orthorhombic Imm2 space group. There are six inequivalent Ta sites. In the first Ta site, Ta(1) is bonded in a 2-coordinate geometry to two equivalent Cr(2), two equivalent Cr(3), two equivalent Co(3), and two equivalent C(1) atoms. In the second Ta site, Ta(2) is bonded in a 2-coordinate geometry to two equivalent Cr(1), two equivalent Co(1), two equivalent Co(2), and two equivalent C(2) atoms. In the third Ta site, Ta(3) is bonded in a 2-coordinate geometry to one Cr(1), one Cr(2), one Cr(3), one Co(1), one Co(2), one Co(3), one C(1), and one C(2) atom. In the fourth Ta site, Ta(4) is bonded in a 2-coordinate geometry to two equivalent Cr(2), two equivalent Co(1), two equivalent Co(2), and two equivalent C(1) atoms. In the fifth Ta site, Ta(5) is bonded in a distorted bent 150 degrees geometry to two equivalent Cr(1), two equivalent Cr(3), two equivalent Co(3), and two equivalent C(2) atoms. In the sixth Ta site, Ta(6) is bonded in a 2-coordinate geometry to one Cr(1), one Cr(2), one Cr(3), one Co(1), one Co(2), one Co(3), one C(1), and one C(2) atom. There are three inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to one Ta(2), one Ta(5), two equivalent Ta(3), two equivalent Ta(6), one Cr(3), one Co(2), two equivalent Co(1), and two equivalent Co(3) atoms to form distorted CrTa6CrCo5 cuboctahedra that share corners with three equivalent Cr(3)Ta6Cr4Co2 cuboctahedra, corners with three equivalent Co(2)Ta6Cr3Co3 cuboctahedra, edges with two equivalent C(1)Ta6 octahedra, edges with four equivalent C(2)Ta6 octahedra, faces with two equivalent Cr(3)Ta6Cr4Co2 cuboctahedra, faces with two equivalent Cr(1)Ta6CrCo5 cuboctahedra, faces with two equivalent Co(2)Ta6Cr3Co3 cuboctahedra, and faces with four equivalent Cr(2)Ta6Cr2Co4 cuboctahedra. In the second Cr site, Cr(2) is bonded to one Ta(1), one Ta(4), two equivalent Ta(3), two equivalent Ta(6), two equivalent Cr(3), one Co(1), one Co(3), and two equivalent Co(2) atoms to form distorted CrTa6Cr2Co4 cuboctahedra that share edges with two equivalent C(2)Ta6 octahedra, edges with four equivalent C(1)Ta6 octahedra, faces with two equivalent Cr(2)Ta6Cr2Co4 cuboctahedra, faces with two equivalent Cr(3)Ta6Cr4Co2 cuboctahedra, faces with two equivalent Co(2)Ta6Cr3Co3 cuboctahedra, and faces with four equivalent Cr(1)Ta6CrCo5 cuboctahedra. In the third Cr site, Cr(3) is bonded to one Ta(1), one Ta(5), two equivalent Ta(3), two equivalent Ta(6), one Cr(1), one Cr(3), two equivalent Cr(2), and two equivalent Co(1) atoms to form distorted CrTa6Cr4Co2 cuboctahedra that share  a cornercorner with one Cr(3)Ta6Cr4Co2 cuboctahedra, corners with three equivalent Cr(1)Ta6CrCo5 cuboctahedra, corners with three equivalent Co(2)Ta6Cr3Co3 cuboctahedra, corners with three equivalent C(1)Ta6 octahedra,  a faceface with one Cr(3)Ta6Cr4Co2 cuboctahedra, faces with two equivalent Cr(2)Ta6Cr2Co4 cuboctahedra, faces with two equivalent Cr(1)Ta6CrCo5 cuboctahedra, faces with two equivalent Co(2)Ta6Cr3Co3 cuboctahedra,  a faceface with one C(1)Ta6 octahedra, and faces with two equivalent C(2)Ta6 octahedra. The corner-sharing octahedral tilt angles range from 42-43°. There are three inequivalent Co sites. In the first Co site, Co(1) is bonded in a 12-coordinate geometry to one Ta(2), one Ta(4), two equivalent Ta(3), two equivalent Ta(6), one Cr(2), two equivalent Cr(1), two equivalent Cr(3), and one Co(1) atom. In the second Co site, Co(2) is bonded to one Ta(2), one Ta(4), two equivalent Ta(3), two equivalent Ta(6), one Cr(1), two equivalent Cr(2), one Co(2), and two equivalent Co(3) atoms to form distorted CoTa6Cr3Co3 cuboctahedra that share  a cornercorner with one Co(2)Ta6Cr3Co3 cuboctahedra, corners with three equivalent Cr(3)Ta6Cr4Co2 cuboctahedra, corners with three equivalent Cr(1)Ta6CrCo5 cuboctahedra, corners with three equivalent C(1)Ta6 octahedra,  a faceface with one Co(2)Ta6Cr3Co3 cuboctahedra, faces with two equivalent Cr(2)Ta6Cr2Co4 cuboctahedra, faces with two equivalent Cr(3)Ta6Cr4Co2 cuboctahedra, faces with two equivalent Cr(1)Ta6CrCo5 cuboctahedra,  a faceface with one C(1)Ta6 octahedra, and faces with two equivalent C(2)Ta6 octahedra. The corner-sharing octahedral tilt angles are 43°. In the third Co site, Co(3) is bonded in a 12-coordinate geometry to one Ta(1), one Ta(5), two equivalent Ta(3), two equivalent Ta(6), one Cr(2), two equivalent Cr(1), one Co(3), and two equivalent Co(2) atoms. There are two inequivalent C sites. In the first C site, C(1) is bonded to one Ta(1), one Ta(4), two equivalent Ta(3), and two equivalent Ta(6) atoms to form CTa6 octahedra that share corners with three equivalent Cr(3)Ta6Cr4Co2 cuboctahedra, corners with three equivalent Co(2)Ta6Cr3Co3 cuboctahedra, corners with two equivalent C(1)Ta6 octahedra, corners with four equivalent C(2)Ta6 octahedra, edges with two equivalent Cr(1)Ta6CrCo5 cuboctahedra, edges with four equivalent Cr(2)Ta6Cr2Co4 cuboctahedra,  a faceface with one Cr(3)Ta6Cr4Co2 cuboctahedra, and  a faceface with one Co(2)Ta6Cr3Co3 cuboctahedra. The corner-sharing octahedral tilt angles range from 43-44°. In the second C site, C(2) is bonded to one Ta(2), one Ta(5), two equivalent Ta(3), and two equivalent Ta(6) atoms to form CTa6 octahedra that share corners with two equivalent C(2)Ta6 octahedra, corners with four equivalent C(1)Ta6 octahedra, edges with two equivalent Cr(2)Ta6Cr2Co4 cuboctahedra, edges with four equivalent Cr(1)Ta6CrCo5 cuboctahedra, faces with two equivalent Cr(3)Ta6Cr4Co2 cuboctahedra, and faces with two equivalent Co(2)Ta6Cr3Co3 cuboctahedra. The corner-sharing octahedral tilt angles range from 43-44°. is represented by the CIF card [CIF]
data_Ta6Cr3Co3C2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.070
_cell_length_b   8.070
_cell_length_c   8.070
_cell_angle_alpha   120.159
_cell_angle_beta   119.900
_cell_angle_gamma   89.950
_symmetry_Int_Tables_number   1
_cell_volume   371.484
_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
  Ta  Ta0  1  0.572  0.072  0.500  1.0
  Ta  Ta1  1  0.179  0.679  0.500  1.0
  Ta  Ta2  1  0.179  0.070  0.500  1.0
  Ta  Ta3  1  0.570  0.679  0.500  1.0
  Ta  Ta4  1  0.570  0.070  0.891  1.0
  Ta  Ta5  1  0.179  0.679  0.109  1.0
  Ta  Ta6  1  0.930  0.930  0.000  1.0
  Ta  Ta7  1  0.320  0.320  0.000  1.0
  Ta  Ta8  1  0.319  0.930  1.000  1.0
  Ta  Ta9  1  0.930  0.319  0.000  1.0
  Ta  Ta10  1  0.930  0.930  0.611  1.0
  Ta  Ta11  1  0.319  0.319  0.389  1.0
  Cr  Cr12  1  0.751  0.503  0.249  1.0
  Cr  Cr13  1  0.254  0.503  0.751  1.0
  Cr  Cr14  1  0.749  0.502  0.753  1.0
  Cr  Cr15  1  0.749  0.996  0.247  1.0
  Cr  Cr16  1  0.953  0.299  0.654  1.0
  Cr  Cr17  1  0.645  0.299  0.346  1.0
  Co  Co18  1  0.954  0.299  0.345  1.0
  Co  Co19  1  0.954  0.609  0.655  1.0
  Co  Co20  1  0.549  0.701  0.848  1.0
  Co  Co21  1  0.853  0.701  0.152  1.0
  Co  Co22  1  0.548  0.702  0.154  1.0
  Co  Co23  1  0.548  0.393  0.846  1.0
  C  C24  1  0.249  1.000  0.250  1.0
  C  C25  1  0.750  1.000  0.750  1.0
  C  C26  1  0.250  0.999  0.749  1.0
  C  C27  1  0.250  0.500  0.251  1.0
[/CIF]
.