Nb6SnSi crystallizes in the cubic Pm-3 space group. Nb(1) is bonded in a 6-coordinate geometry to two equivalent Nb(1), two equivalent Sn(1), and two equivalent Si(1) atoms. Sn(1) is bonded to twelve equivalent Nb(1) atoms to form SnNb12 cuboctahedra that share edges with six equivalent Sn(1)Nb12 cuboctahedra and faces with eight equivalent Si(1)Nb12 cuboctahedra. Si(1) is bonded to twelve equivalent Nb(1) atoms to form SiNb12 cuboctahedra that share edges with six equivalent Si(1)Nb12 cuboctahedra and faces with eight equivalent Sn(1)Nb12 cuboctahedra.
Nb6SnSi crystallizes in the cubic Pm-3 space group. Nb(1) is bonded in a 6-coordinate geometry to two equivalent Nb(1), two equivalent Sn(1), and two equivalent Si(1) atoms. There is one shorter (2.53 Å) and one longer (2.71 Å) Nb(1)-Nb(1) bond length. Both Nb(1)-Sn(1) bond lengths are 2.95 Å. Both Nb(1)-Si(1) bond lengths are 2.91 Å. Sn(1) is bonded to twelve equivalent Nb(1) atoms to form SnNb12 cuboctahedra that share edges with six equivalent Sn(1)Nb12 cuboctahedra and faces with eight equivalent Si(1)Nb12 cuboctahedra. Si(1) is bonded to twelve equivalent Nb(1) atoms to form SiNb12 cuboctahedra that share edges with six equivalent Si(1)Nb12 cuboctahedra and faces with eight equivalent Sn(1)Nb12 cuboctahedra.