VCo2Ni is beta Cu3Ti-derived structured and crystallizes in the trigonal R-3m space group. There are two inequivalent V sites. In the first V site, V(1) is bonded to six Co(1,1,1) and six equivalent Ni(1) atoms to form VCo6Ni6 cuboctahedra that share corners with six equivalent V(1)Co6Ni6 cuboctahedra; corners with twelve Co(1,1)V4Co6Ni2 cuboctahedra; edges with six equivalent Ni(1)V4Co4Ni4 cuboctahedra; edges with twelve Co(1,1,1)V4Co6Ni2 cuboctahedra; faces with six Co(1,1,1)V4Co6Ni2 cuboctahedra; faces with six equivalent Ni(1)V4Co4Ni4 cuboctahedra; and faces with eight equivalent V(2)Co9Ni3 cuboctahedra. In the second V site, V(2) is bonded to nine Co(1,1) and three equivalent Ni(1) atoms to form VCo9Ni3 cuboctahedra that share corners with six equivalent Ni(1)V4Co4Ni4 cuboctahedra; corners with nine equivalent V(2)Co9Ni3 cuboctahedra; edges with six equivalent Ni(1)V4Co4Ni4 cuboctahedra; edges with fifteen Co(1,1,1)V4Co6Ni2 cuboctahedra; faces with three equivalent V(2)Co9Ni3 cuboctahedra; faces with three equivalent Ni(1)V4Co4Ni4 cuboctahedra; faces with four equivalent V(1)Co6Ni6 cuboctahedra; and faces with nine Co(1,1)V4Co6Ni2 cuboctahedra. There are three inequivalent Co sites. In the first Co site, Co(1) is bonded to one V(1); three equivalent V(2); six Co(1,1); and two equivalent Ni(1) atoms to form distorted CoV4Co6Ni2 cuboctahedra that share corners with two equivalent V(1)Co6Ni6 cuboctahedra; corners with four equivalent Ni(1)V4Co4Ni4 cuboctahedra; corners with nine Co(1,1)V4Co6Ni2 cuboctahedra; edges with two equivalent V(1)Co6Ni6 cuboctahedra; edges with four equivalent Ni(1)V4Co4Ni4 cuboctahedra; edges with five equivalent V(2)Co9Ni3 cuboctahedra; edges with ten Co(1,1)V4Co6Ni2 cuboctahedra;  a faceface with one V(1)Co6Ni6 cuboctahedra; faces with three equivalent V(2)Co9Ni3 cuboctahedra; faces with six equivalent Ni(1)V4Co4Ni4 cuboctahedra; and faces with nine Co(1,1)V4Co6Ni2 cuboctahedra. In the second Co site, Co(1) is bonded to one V(1), three equivalent V(2), six equivalent Co(1), and two equivalent Ni(1) atoms to form distorted CoV4Co6Ni2 cuboctahedra that share corners with two equivalent V(1)Co6Ni6 cuboctahedra; corners with four equivalent Ni(1)V4Co4Ni4 cuboctahedra; corners with nine Co(1,1)V4Co6Ni2 cuboctahedra; edges with two equivalent V(1)Co6Ni6 cuboctahedra; edges with four equivalent Ni(1)V4Co4Ni4 cuboctahedra; edges with five equivalent V(2)Co9Ni3 cuboctahedra; edges with ten Co(1,1)V4Co6Ni2 cuboctahedra;  a faceface with one V(1)Co6Ni6 cuboctahedra; faces with three equivalent V(2)Co9Ni3 cuboctahedra; faces with six equivalent Ni(1)V4Co4Ni4 cuboctahedra; and faces with nine equivalent Co(1)V4Co6Ni2 cuboctahedra. In the third Co site, Co(1) is bonded to one V(1), three equivalent V(2), six equivalent Co(1), and two equivalent Ni(1) atoms to form distorted CoV4Co6Ni2 cuboctahedra that share corners with two equivalent V(1)Co6Ni6 cuboctahedra; corners with four equivalent Ni(1)V4Co4Ni4 cuboctahedra; corners with nine Co(1,1)V4Co6Ni2 cuboctahedra; edges with two equivalent V(1)Co6Ni6 cuboctahedra; edges with four equivalent Ni(1)V4Co4Ni4 cuboctahedra; edges with five equivalent V(2)Co9Ni3 cuboctahedra; edges with ten Co(1,1)V4Co6Ni2 cuboctahedra;  a faceface with one V(1)Co6Ni6 cuboctahedra; faces with three equivalent V(2)Co9Ni3 cuboctahedra; faces with six equivalent Ni(1)V4Co4Ni4 cuboctahedra; and faces with nine Co(1,1)V4Co6Ni2 cuboctahedra. Ni(1) is bonded to two equivalent V(1); two equivalent V(2); four Co(1,1,1); and four equivalent Ni(1) atoms to form NiV4Co4Ni4 cuboctahedra that share corners with four equivalent V(2)Co9Ni3 cuboctahedra; corners with six equivalent Ni(1)V4Co4Ni4 cuboctahedra; corners with eight Co(1,1)V4Co6Ni2 cuboctahedra; edges with two equivalent V(1)Co6Ni6 cuboctahedra; edges with four equivalent V(2)Co9Ni3 cuboctahedra; edges with four equivalent Ni(1)V4Co4Ni4 cuboctahedra; edges with eight Co(1,1,1)V4Co6Ni2 cuboctahedra; faces with two equivalent V(1)Co6Ni6 cuboctahedra; faces with two equivalent V(2)Co9Ni3 cuboctahedra; faces with four equivalent Ni(1)V4Co4Ni4 cuboctahedra; and faces with twelve Co(1,1,1)V4Co6Ni2 cuboctahedra.
VCo2Ni is beta Cu3Ti-derived structured and crystallizes in the trigonal R-3m space group. There are two inequivalent V sites. In the first V site, V(1) is bonded to six Co(1,1,1) and six equivalent Ni(1) atoms to form VCo6Ni6 cuboctahedra that share corners with six equivalent V(1)Co6Ni6 cuboctahedra; corners with twelve Co(1,1)V4Co6Ni2 cuboctahedra; edges with six equivalent Ni(1)V4Co4Ni4 cuboctahedra; edges with twelve Co(1,1,1)V4Co6Ni2 cuboctahedra; faces with six Co(1,1,1)V4Co6Ni2 cuboctahedra; faces with six equivalent Ni(1)V4Co4Ni4 cuboctahedra; and faces with eight equivalent V(2)Co9Ni3 cuboctahedra. All V(1)-Co(1,1,1) bond lengths are 2.50 Å. All V(1)-Ni(1) bond lengths are 2.51 Å. In the second V site, V(2) is bonded to nine Co(1,1) and three equivalent Ni(1) atoms to form VCo9Ni3 cuboctahedra that share corners with six equivalent Ni(1)V4Co4Ni4 cuboctahedra; corners with nine equivalent V(2)Co9Ni3 cuboctahedra; edges with six equivalent Ni(1)V4Co4Ni4 cuboctahedra; edges with fifteen Co(1,1,1)V4Co6Ni2 cuboctahedra; faces with three equivalent V(2)Co9Ni3 cuboctahedra; faces with three equivalent Ni(1)V4Co4Ni4 cuboctahedra; faces with four equivalent V(1)Co6Ni6 cuboctahedra; and faces with nine Co(1,1)V4Co6Ni2 cuboctahedra. There are three shorter (2.41 Å) and six longer (2.51 Å) V(2)-Co(1,1) bond lengths. All V(2)-Ni(1) bond lengths are 2.57 Å. There are three inequivalent Co sites. In the first Co site, Co(1) is bonded to one V(1); three equivalent V(2); six Co(1,1); and two equivalent Ni(1) atoms to form distorted CoV4Co6Ni2 cuboctahedra that share corners with two equivalent V(1)Co6Ni6 cuboctahedra; corners with four equivalent Ni(1)V4Co4Ni4 cuboctahedra; corners with nine Co(1,1)V4Co6Ni2 cuboctahedra; edges with two equivalent V(1)Co6Ni6 cuboctahedra; edges with four equivalent Ni(1)V4Co4Ni4 cuboctahedra; edges with five equivalent V(2)Co9Ni3 cuboctahedra; edges with ten Co(1,1)V4Co6Ni2 cuboctahedra;  a faceface with one V(1)Co6Ni6 cuboctahedra; faces with three equivalent V(2)Co9Ni3 cuboctahedra; faces with six equivalent Ni(1)V4Co4Ni4 cuboctahedra; and faces with nine Co(1,1)V4Co6Ni2 cuboctahedra. There are a spread of Co(1)-Co(1,1) bond distances ranging from 2.45-2.56 Å. Both Co(1)-Ni(1) bond lengths are 2.47 Å. In the second Co site, Co(1) is bonded to one V(1), three equivalent V(2), six equivalent Co(1), and two equivalent Ni(1) atoms to form distorted CoV4Co6Ni2 cuboctahedra that share corners with two equivalent V(1)Co6Ni6 cuboctahedra; corners with four equivalent Ni(1)V4Co4Ni4 cuboctahedra; corners with nine Co(1,1)V4Co6Ni2 cuboctahedra; edges with two equivalent V(1)Co6Ni6 cuboctahedra; edges with four equivalent Ni(1)V4Co4Ni4 cuboctahedra; edges with five equivalent V(2)Co9Ni3 cuboctahedra; edges with ten Co(1,1)V4Co6Ni2 cuboctahedra;  a faceface with one V(1)Co6Ni6 cuboctahedra; faces with three equivalent V(2)Co9Ni3 cuboctahedra; faces with six equivalent Ni(1)V4Co4Ni4 cuboctahedra; and faces with nine equivalent Co(1)V4Co6Ni2 cuboctahedra. Both Co(1)-Ni(1) bond lengths are 2.47 Å. In the third Co site, Co(1) is bonded to one V(1), three equivalent V(2), six equivalent Co(1), and two equivalent Ni(1) atoms to form distorted CoV4Co6Ni2 cuboctahedra that share corners with two equivalent V(1)Co6Ni6 cuboctahedra; corners with four equivalent Ni(1)V4Co4Ni4 cuboctahedra; corners with nine Co(1,1)V4Co6Ni2 cuboctahedra; edges with two equivalent V(1)Co6Ni6 cuboctahedra; edges with four equivalent Ni(1)V4Co4Ni4 cuboctahedra; edges with five equivalent V(2)Co9Ni3 cuboctahedra; edges with ten Co(1,1)V4Co6Ni2 cuboctahedra;  a faceface with one V(1)Co6Ni6 cuboctahedra; faces with three equivalent V(2)Co9Ni3 cuboctahedra; faces with six equivalent Ni(1)V4Co4Ni4 cuboctahedra; and faces with nine Co(1,1)V4Co6Ni2 cuboctahedra. There is one shorter (2.41 Å) and two longer (2.51 Å) Co(1)-V(2) bond lengths. There are a spread of Co(1)-Co(1) bond distances ranging from 2.45-2.56 Å. Both Co(1)-Ni(1) bond lengths are 2.47 Å. Ni(1) is bonded to two equivalent V(1); two equivalent V(2); four Co(1,1,1); and four equivalent Ni(1) atoms to form NiV4Co4Ni4 cuboctahedra that share corners with four equivalent V(2)Co9Ni3 cuboctahedra; corners with six equivalent Ni(1)V4Co4Ni4 cuboctahedra; corners with eight Co(1,1)V4Co6Ni2 cuboctahedra; edges with two equivalent V(1)Co6Ni6 cuboctahedra; edges with four equivalent V(2)Co9Ni3 cuboctahedra; edges with four equivalent Ni(1)V4Co4Ni4 cuboctahedra; edges with eight Co(1,1,1)V4Co6Ni2 cuboctahedra; faces with two equivalent V(1)Co6Ni6 cuboctahedra; faces with two equivalent V(2)Co9Ni3 cuboctahedra; faces with four equivalent Ni(1)V4Co4Ni4 cuboctahedra; and faces with twelve Co(1,1,1)V4Co6Ni2 cuboctahedra. All Ni(1)-Ni(1) bond lengths are 2.51 Å.