Cr crystallizes in the cubic Pm-3n space group. There are two inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to twelve equivalent Cr(2) atoms to form a mixture of edge and face-sharing CrCr12 cuboctahedra. In the second Cr site, Cr(2) is bonded in a 14-coordinate geometry to four equivalent Cr(1) and ten equivalent Cr(2) atoms.
Cr crystallizes in the cubic Pm-3n space group. There are two inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to twelve equivalent Cr(2) atoms to form a mixture of edge and face-sharing CrCr12 cuboctahedra. All Cr(1)-Cr(2) bond lengths are 2.52 Å. In the second Cr site, Cr(2) is bonded in a 14-coordinate geometry to four equivalent Cr(1) and ten equivalent Cr(2) atoms. There are two shorter (2.26 Å) and eight longer (2.76 Å) Cr(2)-Cr(2) bond lengths.