The structure described by NbVCo is Frank-Kasper $\mu$ Phase-derived structured and crystallizes in the orthorhombic Amm2 space group. There are five inequivalent Nb sites. In the first Nb site, Nb(1) is bonded in a 16-coordinate geometry to one Nb(1); three Nb(2,2); one V(3); two equivalent V(1); two equivalent V(2); three equivalent Co(1); and four equivalent Co(2) atoms. In the second Nb site, Nb(2) is bonded in a 16-coordinate geometry to one Nb(2), three equivalent Nb(1), one V(1), two equivalent V(3), four equivalent V(2), two equivalent Co(2), and three equivalent Co(1) atoms. In the third Nb site, Nb(2) is bonded in a 16-coordinate geometry to one Nb(2), three equivalent Nb(1), one V(1), two equivalent V(3), four equivalent V(2), two equivalent Co(2), and three equivalent Co(1) atoms. In the fourth Nb site, Nb(1) is bonded in a 16-coordinate geometry to one Nb(1), three equivalent Nb(2), one V(3), two equivalent V(1), two equivalent V(2), three equivalent Co(1), and four equivalent Co(2) atoms. In the fifth Nb site, Nb(2) is bonded in a 16-coordinate geometry to one Nb(2), three equivalent Nb(1), one V(1), two equivalent V(3), four equivalent V(2), two equivalent Co(2), and three equivalent Co(1) atoms. There are three inequivalent V sites. In the first V site, V(1) is bonded in a 6-coordinate geometry to two Nb(2,2); four Nb(1,1); two equivalent Co(1); and four equivalent Co(2) atoms. In the second V site, V(2) is bonded to two Nb(1,1); four Nb(2,2,2); two equivalent V(2); two equivalent V(3); and two equivalent Co(1) atoms to form distorted VNb6V4Co2 cuboctahedra that share corners with four equivalent V(2)Nb6V4Co2 cuboctahedra, corners with four equivalent Co(1)Nb6V4Co2 cuboctahedra, corners with six equivalent Co(2)Nb6V2Co4 cuboctahedra, edges with two equivalent V(2)Nb6V4Co2 cuboctahedra, edges with four equivalent Co(2)Nb6V2Co4 cuboctahedra, faces with two equivalent Co(2)Nb6V2Co4 cuboctahedra, faces with four equivalent V(2)Nb6V4Co2 cuboctahedra, faces with four equivalent V(3)Nb6V4Co2 cuboctahedra, and faces with six equivalent Co(1)Nb6V4Co2 cuboctahedra. In the third V site, V(3) is bonded to two Nb(1,1); four Nb(2,2); four equivalent V(2); and two equivalent Co(1) atoms to form distorted VNb6V4Co2 cuboctahedra that share corners with four equivalent V(3)Nb6V4Co2 cuboctahedra, corners with four equivalent Co(1)Nb6V4Co2 cuboctahedra, corners with eight equivalent Co(2)Nb6V2Co4 cuboctahedra, edges with two equivalent V(3)Nb6V4Co2 cuboctahedra, faces with four equivalent Co(2)Nb6V2Co4 cuboctahedra, faces with six equivalent Co(1)Nb6V4Co2 cuboctahedra, and faces with eight equivalent V(2)Nb6V4Co2 cuboctahedra. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to three equivalent Nb(1); three Nb(2,2); one V(1); one V(3); two equivalent V(2); and two equivalent Co(2) atoms to form distorted CoNb6V4Co2 cuboctahedra that share corners with two equivalent V(3)Nb6V4Co2 cuboctahedra, corners with four equivalent V(2)Nb6V4Co2 cuboctahedra, corners with four equivalent Co(2)Nb6V2Co4 cuboctahedra, edges with six equivalent Co(1)Nb6V4Co2 cuboctahedra, faces with two equivalent Co(1)Nb6V4Co2 cuboctahedra, faces with three equivalent V(3)Nb6V4Co2 cuboctahedra, faces with six equivalent V(2)Nb6V4Co2 cuboctahedra, and faces with six equivalent Co(2)Nb6V2Co4 cuboctahedra. In the second Co site, Co(2) is bonded to two Nb(2,2); four Nb(1,1); two equivalent V(1); two equivalent Co(1); and two equivalent Co(2) atoms to form distorted CoNb6V2Co4 cuboctahedra that share corners with four equivalent V(3)Nb6V4Co2 cuboctahedra, corners with four equivalent Co(2)Nb6V2Co4 cuboctahedra, corners with four equivalent Co(1)Nb6V4Co2 cuboctahedra, corners with six equivalent V(2)Nb6V4Co2 cuboctahedra, edges with two equivalent Co(2)Nb6V2Co4 cuboctahedra, edges with four equivalent V(2)Nb6V4Co2 cuboctahedra, faces with two equivalent V(2)Nb6V4Co2 cuboctahedra, faces with two equivalent V(3)Nb6V4Co2 cuboctahedra, faces with four equivalent Co(2)Nb6V2Co4 cuboctahedra, and faces with six equivalent Co(1)Nb6V4Co2 cuboctahedra. is represented by the CIF file [CIF]
data_NbVCo
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.837
_cell_length_b   4.837
_cell_length_c   8.054
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   118.740
_symmetry_Int_Tables_number   1
_cell_volume   165.216
_cell_formula_units_Z   4
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
  Nb  Nb0  1  0.671  0.329  0.316  1.0
  Nb  Nb1  1  0.341  0.659  0.196  1.0
  Nb  Nb2  1  0.341  0.659  0.804  1.0
  Nb  Nb3  1  0.671  0.329  0.684  1.0
  V  V4  1  0.156  0.844  0.500  1.0
  V  V5  1  0.340  0.162  0.000  1.0
  V  V6  1  0.838  0.660  0.000  1.0
  V  V7  1  0.833  0.167  0.000  1.0
  Co  Co8  1  0.000  1.000  0.257  1.0
  Co  Co9  1  0.000  1.000  0.743  1.0
  Co  Co10  1  0.651  0.842  0.500  1.0
  Co  Co11  1  0.158  0.349  0.500  1.0
[/CIF]
.
The structure described by NbVCo is Frank-Kasper $\mu$ Phase-derived structured and crystallizes in the orthorhombic Amm2 space group. There are five inequivalent Nb sites. In the first Nb site, Nb(1) is bonded in a 16-coordinate geometry to one Nb(1); three Nb(2,2); one V(3); two equivalent V(1); two equivalent V(2); three equivalent Co(1); and four equivalent Co(2) atoms. In the second Nb site, Nb(2) is bonded in a 16-coordinate geometry to one Nb(2), three equivalent Nb(1), one V(1), two equivalent V(3), four equivalent V(2), two equivalent Co(2), and three equivalent Co(1) atoms. In the third Nb site, Nb(2) is bonded in a 16-coordinate geometry to one Nb(2), three equivalent Nb(1), one V(1), two equivalent V(3), four equivalent V(2), two equivalent Co(2), and three equivalent Co(1) atoms. In the fourth Nb site, Nb(1) is bonded in a 16-coordinate geometry to one Nb(1), three equivalent Nb(2), one V(3), two equivalent V(1), two equivalent V(2), three equivalent Co(1), and four equivalent Co(2) atoms. In the fifth Nb site, Nb(2) is bonded in a 16-coordinate geometry to one Nb(2), three equivalent Nb(1), one V(1), two equivalent V(3), four equivalent V(2), two equivalent Co(2), and three equivalent Co(1) atoms. There are three inequivalent V sites. In the first V site, V(1) is bonded in a 6-coordinate geometry to two Nb(2,2); four Nb(1,1); two equivalent Co(1); and four equivalent Co(2) atoms. In the second V site, V(2) is bonded to two Nb(1,1); four Nb(2,2,2); two equivalent V(2); two equivalent V(3); and two equivalent Co(1) atoms to form distorted VNb6V4Co2 cuboctahedra that share corners with four equivalent V(2)Nb6V4Co2 cuboctahedra, corners with four equivalent Co(1)Nb6V4Co2 cuboctahedra, corners with six equivalent Co(2)Nb6V2Co4 cuboctahedra, edges with two equivalent V(2)Nb6V4Co2 cuboctahedra, edges with four equivalent Co(2)Nb6V2Co4 cuboctahedra, faces with two equivalent Co(2)Nb6V2Co4 cuboctahedra, faces with four equivalent V(2)Nb6V4Co2 cuboctahedra, faces with four equivalent V(3)Nb6V4Co2 cuboctahedra, and faces with six equivalent Co(1)Nb6V4Co2 cuboctahedra. In the third V site, V(3) is bonded to two Nb(1,1); four Nb(2,2); four equivalent V(2); and two equivalent Co(1) atoms to form distorted VNb6V4Co2 cuboctahedra that share corners with four equivalent V(3)Nb6V4Co2 cuboctahedra, corners with four equivalent Co(1)Nb6V4Co2 cuboctahedra, corners with eight equivalent Co(2)Nb6V2Co4 cuboctahedra, edges with two equivalent V(3)Nb6V4Co2 cuboctahedra, faces with four equivalent Co(2)Nb6V2Co4 cuboctahedra, faces with six equivalent Co(1)Nb6V4Co2 cuboctahedra, and faces with eight equivalent V(2)Nb6V4Co2 cuboctahedra. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to three equivalent Nb(1); three Nb(2,2); one V(1); one V(3); two equivalent V(2); and two equivalent Co(2) atoms to form distorted CoNb6V4Co2 cuboctahedra that share corners with two equivalent V(3)Nb6V4Co2 cuboctahedra, corners with four equivalent V(2)Nb6V4Co2 cuboctahedra, corners with four equivalent Co(2)Nb6V2Co4 cuboctahedra, edges with six equivalent Co(1)Nb6V4Co2 cuboctahedra, faces with two equivalent Co(1)Nb6V4Co2 cuboctahedra, faces with three equivalent V(3)Nb6V4Co2 cuboctahedra, faces with six equivalent V(2)Nb6V4Co2 cuboctahedra, and faces with six equivalent Co(2)Nb6V2Co4 cuboctahedra. In the second Co site, Co(2) is bonded to two Nb(2,2); four Nb(1,1); two equivalent V(1); two equivalent Co(1); and two equivalent Co(2) atoms to form distorted CoNb6V2Co4 cuboctahedra that share corners with four equivalent V(3)Nb6V4Co2 cuboctahedra, corners with four equivalent Co(2)Nb6V2Co4 cuboctahedra, corners with four equivalent Co(1)Nb6V4Co2 cuboctahedra, corners with six equivalent V(2)Nb6V4Co2 cuboctahedra, edges with two equivalent Co(2)Nb6V2Co4 cuboctahedra, edges with four equivalent V(2)Nb6V4Co2 cuboctahedra, faces with two equivalent V(2)Nb6V4Co2 cuboctahedra, faces with two equivalent V(3)Nb6V4Co2 cuboctahedra, faces with four equivalent Co(2)Nb6V2Co4 cuboctahedra, and faces with six equivalent Co(1)Nb6V4Co2 cuboctahedra. is represented by the CIF file [CIF]
data_NbVCo
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.837
_cell_length_b   4.837
_cell_length_c   8.054
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   118.740
_symmetry_Int_Tables_number   1
_cell_volume   165.216
_cell_formula_units_Z   4
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
  Nb  Nb0  1  0.671  0.329  0.316  1.0
  Nb  Nb1  1  0.341  0.659  0.196  1.0
  Nb  Nb2  1  0.341  0.659  0.804  1.0
  Nb  Nb3  1  0.671  0.329  0.684  1.0
  V  V4  1  0.156  0.844  0.500  1.0
  V  V5  1  0.340  0.162  0.000  1.0
  V  V6  1  0.838  0.660  0.000  1.0
  V  V7  1  0.833  0.167  0.000  1.0
  Co  Co8  1  0.000  1.000  0.257  1.0
  Co  Co9  1  0.000  1.000  0.743  1.0
  Co  Co10  1  0.651  0.842  0.500  1.0
  Co  Co11  1  0.158  0.349  0.500  1.0
[/CIF]
.