Cr2Nb is Hexagonal Laves 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), three equivalent Cr(1), and nine equivalent Cr(2) atoms. There are two inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to six equivalent Nb(1) and six equivalent Cr(2) atoms to form a mixture of edge, face, and corner-sharing CrNb6Cr6 cuboctahedra. In the second Cr site, Cr(2) is bonded to six equivalent Nb(1), two equivalent Cr(1), and four equivalent Cr(2) atoms to form a mixture of edge, face, and corner-sharing CrNb6Cr6 cuboctahedra.
Cr2Nb is Hexagonal Laves 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), three equivalent Cr(1), and nine equivalent Cr(2) atoms. There are three shorter (2.98 Å) and one longer (3.07 Å) Nb(1)-Nb(1) bond length. All Nb(1)-Cr(1) bond lengths are 2.86 Å. There are three shorter (2.85 Å) and six longer (2.89 Å) Nb(1)-Cr(2) bond lengths. There are two inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to six equivalent Nb(1) and six equivalent Cr(2) atoms to form a mixture of edge, face, and corner-sharing CrNb6Cr6 cuboctahedra. All Cr(1)-Cr(2) bond lengths are 2.47 Å. In the second Cr site, Cr(2) is bonded to six equivalent Nb(1), two equivalent Cr(1), and four equivalent Cr(2) atoms to form a mixture of edge, face, and corner-sharing CrNb6Cr6 cuboctahedra. There are two shorter (2.40 Å) and two longer (2.49 Å) Cr(2)-Cr(2) bond lengths.