Cr3Co is beta Cu3Ti-like structured and crystallizes in the hexagonal P6_3/mmc space group. There are two inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to eight Cr(1,1) and four equivalent Co(1) atoms to form CrCr8Co4 cuboctahedra that share corners with four equivalent Co(1)Cr12 cuboctahedra; corners with fourteen Cr(1,1)Cr8Co4 cuboctahedra; edges with six equivalent Co(1)Cr12 cuboctahedra; edges with twelve Cr(1,1)Cr8Co4 cuboctahedra; faces with four equivalent Co(1)Cr12 cuboctahedra; and faces with sixteen Cr(1,1)Cr8Co4 cuboctahedra. In the second Cr site, Cr(1) is bonded to eight equivalent Cr(1) and four equivalent Co(1) atoms to form CrCr8Co4 cuboctahedra that share corners with four equivalent Co(1)Cr12 cuboctahedra; corners with fourteen Cr(1,1)Cr8Co4 cuboctahedra; edges with six equivalent Co(1)Cr12 cuboctahedra; edges with twelve equivalent Cr(1)Cr8Co4 cuboctahedra; faces with four equivalent Co(1)Cr12 cuboctahedra; and faces with sixteen Cr(1,1)Cr8Co4 cuboctahedra. Co(1) is bonded to twelve Cr(1,1) atoms to form CoCr12 cuboctahedra that share corners with six equivalent Co(1)Cr12 cuboctahedra; corners with twelve Cr(1,1)Cr8Co4 cuboctahedra; edges with eighteen Cr(1,1)Cr8Co4 cuboctahedra; faces with eight equivalent Co(1)Cr12 cuboctahedra; and faces with twelve Cr(1,1)Cr8Co4 cuboctahedra.
Cr3Co is beta Cu3Ti-like structured and crystallizes in the hexagonal P6_3/mmc space group. There are two inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to eight Cr(1,1) and four equivalent Co(1) atoms to form CrCr8Co4 cuboctahedra that share corners with four equivalent Co(1)Cr12 cuboctahedra; corners with fourteen Cr(1,1)Cr8Co4 cuboctahedra; edges with six equivalent Co(1)Cr12 cuboctahedra; edges with twelve Cr(1,1)Cr8Co4 cuboctahedra; faces with four equivalent Co(1)Cr12 cuboctahedra; and faces with sixteen Cr(1,1)Cr8Co4 cuboctahedra. There are a spread of Cr(1)-Cr(1,1) bond distances ranging from 2.50-2.57 Å. There are two shorter (2.52 Å) and two longer (2.54 Å) Cr(1)-Co(1) bond lengths. In the second Cr site, Cr(1) is bonded to eight equivalent Cr(1) and four equivalent Co(1) atoms to form CrCr8Co4 cuboctahedra that share corners with four equivalent Co(1)Cr12 cuboctahedra; corners with fourteen Cr(1,1)Cr8Co4 cuboctahedra; edges with six equivalent Co(1)Cr12 cuboctahedra; edges with twelve equivalent Cr(1)Cr8Co4 cuboctahedra; faces with four equivalent Co(1)Cr12 cuboctahedra; and faces with sixteen Cr(1,1)Cr8Co4 cuboctahedra. There are two shorter (2.52 Å) and two longer (2.54 Å) Cr(1)-Co(1) bond lengths. Co(1) is bonded to twelve Cr(1,1) atoms to form CoCr12 cuboctahedra that share corners with six equivalent Co(1)Cr12 cuboctahedra; corners with twelve Cr(1,1)Cr8Co4 cuboctahedra; edges with eighteen Cr(1,1)Cr8Co4 cuboctahedra; faces with eight equivalent Co(1)Cr12 cuboctahedra; and faces with twelve Cr(1,1)Cr8Co4 cuboctahedra.