Nb2Co3Si is Hexagonal Laves-derived structured and crystallizes in the hexagonal P6_3/mmc space group. Nb(1) is bonded in a 16-coordinate geometry to four equivalent Nb(1), nine equivalent Co(1), and three equivalent Si(1) atoms. Co(1) is bonded to six equivalent Nb(1), four equivalent Co(1), and two equivalent Si(1) atoms to form CoNb6Co4Si2 cuboctahedra that share corners with four equivalent Si(1)Nb6Co6 cuboctahedra, corners with fourteen equivalent Co(1)Nb6Co4Si2 cuboctahedra, edges with six equivalent Co(1)Nb6Co4Si2 cuboctahedra, faces with six equivalent Si(1)Nb6Co6 cuboctahedra, and faces with twelve equivalent Co(1)Nb6Co4Si2 cuboctahedra. Si(1) is bonded to six equivalent Nb(1) and six equivalent Co(1) atoms to form SiNb6Co6 cuboctahedra that share corners with twelve equivalent Co(1)Nb6Co4Si2 cuboctahedra, edges with six equivalent Si(1)Nb6Co6 cuboctahedra, faces with two equivalent Si(1)Nb6Co6 cuboctahedra, and faces with eighteen equivalent Co(1)Nb6Co4Si2 cuboctahedra.
Nb2Co3Si is Hexagonal Laves-derived structured and crystallizes in the hexagonal P6_3/mmc space group. Nb(1) is bonded in a 16-coordinate geometry to four equivalent Nb(1), nine equivalent Co(1), and three equivalent Si(1) atoms. There is one shorter (2.85 Å) and three longer (2.93 Å) Nb(1)-Nb(1) bond lengths. There are three shorter (2.70 Å) and six longer (2.81 Å) Nb(1)-Co(1) bond lengths. All Nb(1)-Si(1) bond lengths are 2.83 Å. Co(1) is bonded to six equivalent Nb(1), four equivalent Co(1), and two equivalent Si(1) atoms to form CoNb6Co4Si2 cuboctahedra that share corners with four equivalent Si(1)Nb6Co6 cuboctahedra, corners with fourteen equivalent Co(1)Nb6Co4Si2 cuboctahedra, edges with six equivalent Co(1)Nb6Co4Si2 cuboctahedra, faces with six equivalent Si(1)Nb6Co6 cuboctahedra, and faces with twelve equivalent Co(1)Nb6Co4Si2 cuboctahedra. There are two shorter (2.37 Å) and two longer (2.46 Å) Co(1)-Co(1) bond lengths. Both Co(1)-Si(1) bond lengths are 2.35 Å. Si(1) is bonded to six equivalent Nb(1) and six equivalent Co(1) atoms to form SiNb6Co6 cuboctahedra that share corners with twelve equivalent Co(1)Nb6Co4Si2 cuboctahedra, edges with six equivalent Si(1)Nb6Co6 cuboctahedra, faces with two equivalent Si(1)Nb6Co6 cuboctahedra, and faces with eighteen equivalent Co(1)Nb6Co4Si2 cuboctahedra.