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.
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. The Nb(1)-Nb(1) bond length is 2.96 Å. There is one shorter (2.91 Å) and two longer (3.00 Å) Nb(1)-Nb(2,2) bond lengths. The Nb(1)-V(3) bond length is 2.88 Å. Both Nb(1)-V(1) bond lengths are 2.88 Å. Both Nb(1)-V(2) bond lengths are 2.91 Å. There is one shorter (2.78 Å) and two longer (2.89 Å) Nb(1)-Co(1) bond lengths. There are two shorter (2.74 Å) and two longer (2.93 Å) Nb(1)-Co(2) bond lengths. 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. The Nb(2)-Nb(2) bond length is 3.16 Å. The Nb(2)-V(1) bond length is 2.89 Å. Both Nb(2)-V(3) bond lengths are 2.93 Å. There are two shorter (2.88 Å) and two longer (2.90 Å) Nb(2)-V(2) bond lengths. Both Nb(2)-Co(2) bond lengths are 2.78 Å. There are two shorter (2.84 Å) and one longer (2.88 Å) Nb(2)-Co(1) bond length. 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. There is one shorter (2.91 Å) and two longer (3.00 Å) Nb(2)-Nb(1) bond lengths. The Nb(2)-V(1) bond length is 2.89 Å. Both Nb(2)-V(3) bond lengths are 2.93 Å. There are two shorter (2.88 Å) and two longer (2.90 Å) Nb(2)-V(2) bond lengths. Both Nb(2)-Co(2) bond lengths are 2.78 Å. There are two shorter (2.84 Å) and one longer (2.88 Å) Nb(2)-Co(1) bond length. 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. The Nb(1)-V(3) bond length is 2.88 Å. Both Nb(1)-V(1) bond lengths are 2.88 Å. Both Nb(1)-V(2) bond lengths are 2.91 Å. There is one shorter (2.78 Å) and two longer (2.89 Å) Nb(1)-Co(1) bond lengths. There are two shorter (2.74 Å) and two longer (2.93 Å) Nb(1)-Co(2) bond lengths. 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. The Nb(2)-Nb(2) bond length is 3.16 Å. The Nb(2)-V(1) bond length is 2.89 Å. Both Nb(2)-V(3) bond lengths are 2.93 Å. There are two shorter (2.88 Å) and two longer (2.90 Å) Nb(2)-V(2) bond lengths. Both Nb(2)-Co(2) bond lengths are 2.78 Å. There are two shorter (2.84 Å) and one longer (2.88 Å) Nb(2)-Co(1) bond length. 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. Both V(1)-Co(1) bond lengths are 2.35 Å. There are two shorter (2.39 Å) and two longer (2.44 Å) V(1)-Co(2) bond lengths. 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. There is one shorter (2.46 Å) and one longer (2.47 Å) V(2)-V(2) bond length. There is one shorter (2.37 Å) and one longer (2.46 Å) V(2)-V(3) bond length. Both V(2)-Co(1) bond lengths are 2.52 Å. 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. Both V(3)-Co(1) bond lengths are 2.49 Å. 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. Both Co(1)-Co(2) bond lengths are 2.46 Å. 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. There is one shorter (2.43 Å) and one longer (2.50 Å) Co(2)-Co(2) bond length.