TaMoCo6 is beta Cu3Ti-derived structured and crystallizes in the hexagonal P-6m2 space group. Ta(1) is bonded to six equivalent Co(1) and six Co(2,2) atoms to form TaCo12 cuboctahedra that share corners with six equivalent Ta(1)Co12 cuboctahedra; corners with twelve Co(2,2)Ta2Co8Mo2 cuboctahedra; edges with six Co(2,2)Ta2Co8Mo2 cuboctahedra; edges with twelve equivalent Co(1)Ta2Co8Mo2 cuboctahedra; faces with two equivalent Ta(1)Co12 cuboctahedra; faces with six equivalent Mo(1)Co12 cuboctahedra; faces with six equivalent Co(1)Ta2Co8Mo2 cuboctahedra; and faces with six Co(2,2)Ta2Co8Mo2 cuboctahedra. Mo(1) is bonded to six equivalent Co(1) and six Co(2,2) atoms to form MoCo12 cuboctahedra that share corners with six equivalent Mo(1)Co12 cuboctahedra; corners with twelve equivalent Co(1)Ta2Co8Mo2 cuboctahedra; edges with six equivalent Co(1)Ta2Co8Mo2 cuboctahedra; edges with twelve Co(2,2)Ta2Co8Mo2 cuboctahedra; faces with two equivalent Mo(1)Co12 cuboctahedra; faces with six equivalent Ta(1)Co12 cuboctahedra; faces with six equivalent Co(1)Ta2Co8Mo2 cuboctahedra; and faces with six Co(2,2)Ta2Co8Mo2 cuboctahedra. There are three inequivalent Co sites. In the first Co site, Co(1) is bonded to two equivalent Ta(1); two equivalent Mo(1); four equivalent Co(1); and four Co(2,2) atoms to form distorted CoTa2Co8Mo2 cuboctahedra that share corners with four equivalent Mo(1)Co12 cuboctahedra; corners with fourteen equivalent Co(1)Ta2Co8Mo2 cuboctahedra; edges with two equivalent Mo(1)Co12 cuboctahedra; edges with four equivalent Ta(1)Co12 cuboctahedra; edges with four equivalent Co(1)Ta2Co8Mo2 cuboctahedra; edges with eight Co(2,2)Ta2Co8Mo2 cuboctahedra; faces with two equivalent Ta(1)Co12 cuboctahedra; faces with two equivalent Mo(1)Co12 cuboctahedra; faces with six equivalent Co(1)Ta2Co8Mo2 cuboctahedra; and faces with ten Co(2,2)Ta2Co8Mo2 cuboctahedra. In the second Co site, Co(2) is bonded to two equivalent Ta(1); two equivalent Mo(1); four equivalent Co(1); and four Co(2,2) atoms to form distorted CoTa2Co8Mo2 cuboctahedra that share corners with four equivalent Ta(1)Co12 cuboctahedra; corners with fourteen Co(2,2)Ta2Co8Mo2 cuboctahedra; edges with two equivalent Ta(1)Co12 cuboctahedra; edges with four equivalent Mo(1)Co12 cuboctahedra; edges with four Co(2,2)Ta2Co8Mo2 cuboctahedra; edges with eight equivalent Co(1)Ta2Co8Mo2 cuboctahedra; faces with two equivalent Ta(1)Co12 cuboctahedra; faces with two equivalent Mo(1)Co12 cuboctahedra; faces with six Co(2,2)Ta2Co8Mo2 cuboctahedra; and faces with ten equivalent Co(1)Ta2Co8Mo2 cuboctahedra. In the third Co site, Co(2) is bonded to two equivalent Ta(1), two equivalent Mo(1), four equivalent Co(1), and four equivalent Co(2) atoms to form distorted CoTa2Co8Mo2 cuboctahedra that share corners with four equivalent Ta(1)Co12 cuboctahedra; corners with fourteen Co(2,2)Ta2Co8Mo2 cuboctahedra; edges with two equivalent Ta(1)Co12 cuboctahedra; edges with four equivalent Mo(1)Co12 cuboctahedra; edges with four equivalent Co(2)Ta2Co8Mo2 cuboctahedra; edges with eight equivalent Co(1)Ta2Co8Mo2 cuboctahedra; faces with two equivalent Ta(1)Co12 cuboctahedra; faces with two equivalent Mo(1)Co12 cuboctahedra; faces with six Co(2,2)Ta2Co8Mo2 cuboctahedra; and faces with ten equivalent Co(1)Ta2Co8Mo2 cuboctahedra.
TaMoCo6 is beta Cu3Ti-derived structured and crystallizes in the hexagonal P-6m2 space group. Ta(1) is bonded to six equivalent Co(1) and six Co(2,2) atoms to form TaCo12 cuboctahedra that share corners with six equivalent Ta(1)Co12 cuboctahedra; corners with twelve Co(2,2)Ta2Co8Mo2 cuboctahedra; edges with six Co(2,2)Ta2Co8Mo2 cuboctahedra; edges with twelve equivalent Co(1)Ta2Co8Mo2 cuboctahedra; faces with two equivalent Ta(1)Co12 cuboctahedra; faces with six equivalent Mo(1)Co12 cuboctahedra; faces with six equivalent Co(1)Ta2Co8Mo2 cuboctahedra; and faces with six Co(2,2)Ta2Co8Mo2 cuboctahedra. All Ta(1)-Co(1) bond lengths are 2.56 Å. All Ta(1)-Co(2,2) bond lengths are 2.55 Å. Mo(1) is bonded to six equivalent Co(1) and six Co(2,2) atoms to form MoCo12 cuboctahedra that share corners with six equivalent Mo(1)Co12 cuboctahedra; corners with twelve equivalent Co(1)Ta2Co8Mo2 cuboctahedra; edges with six equivalent Co(1)Ta2Co8Mo2 cuboctahedra; edges with twelve Co(2,2)Ta2Co8Mo2 cuboctahedra; faces with two equivalent Mo(1)Co12 cuboctahedra; faces with six equivalent Ta(1)Co12 cuboctahedra; faces with six equivalent Co(1)Ta2Co8Mo2 cuboctahedra; and faces with six Co(2,2)Ta2Co8Mo2 cuboctahedra. All Mo(1)-Co(1) bond lengths are 2.55 Å. All Mo(1)-Co(2,2) bond lengths are 2.55 Å. There are three inequivalent Co sites. In the first Co site, Co(1) is bonded to two equivalent Ta(1); two equivalent Mo(1); four equivalent Co(1); and four Co(2,2) atoms to form distorted CoTa2Co8Mo2 cuboctahedra that share corners with four equivalent Mo(1)Co12 cuboctahedra; corners with fourteen equivalent Co(1)Ta2Co8Mo2 cuboctahedra; edges with two equivalent Mo(1)Co12 cuboctahedra; edges with four equivalent Ta(1)Co12 cuboctahedra; edges with four equivalent Co(1)Ta2Co8Mo2 cuboctahedra; edges with eight Co(2,2)Ta2Co8Mo2 cuboctahedra; faces with two equivalent Ta(1)Co12 cuboctahedra; faces with two equivalent Mo(1)Co12 cuboctahedra; faces with six equivalent Co(1)Ta2Co8Mo2 cuboctahedra; and faces with ten Co(2,2)Ta2Co8Mo2 cuboctahedra. There are two shorter (2.43 Å) and two longer (2.67 Å) Co(1)-Co(1) bond lengths. All Co(1)-Co(2,2) bond lengths are 2.49 Å. In the second Co site, Co(2) is bonded to two equivalent Ta(1); two equivalent Mo(1); four equivalent Co(1); and four Co(2,2) atoms to form distorted CoTa2Co8Mo2 cuboctahedra that share corners with four equivalent Ta(1)Co12 cuboctahedra; corners with fourteen Co(2,2)Ta2Co8Mo2 cuboctahedra; edges with two equivalent Ta(1)Co12 cuboctahedra; edges with four equivalent Mo(1)Co12 cuboctahedra; edges with four Co(2,2)Ta2Co8Mo2 cuboctahedra; edges with eight equivalent Co(1)Ta2Co8Mo2 cuboctahedra; faces with two equivalent Ta(1)Co12 cuboctahedra; faces with two equivalent Mo(1)Co12 cuboctahedra; faces with six Co(2,2)Ta2Co8Mo2 cuboctahedra; and faces with ten equivalent Co(1)Ta2Co8Mo2 cuboctahedra. There are two shorter (2.48 Å) and two longer (2.62 Å) Co(2)-Co(2,2) bond lengths. In the third Co site, Co(2) is bonded to two equivalent Ta(1), two equivalent Mo(1), four equivalent Co(1), and four equivalent Co(2) atoms to form distorted CoTa2Co8Mo2 cuboctahedra that share corners with four equivalent Ta(1)Co12 cuboctahedra; corners with fourteen Co(2,2)Ta2Co8Mo2 cuboctahedra; edges with two equivalent Ta(1)Co12 cuboctahedra; edges with four equivalent Mo(1)Co12 cuboctahedra; edges with four equivalent Co(2)Ta2Co8Mo2 cuboctahedra; edges with eight equivalent Co(1)Ta2Co8Mo2 cuboctahedra; faces with two equivalent Ta(1)Co12 cuboctahedra; faces with two equivalent Mo(1)Co12 cuboctahedra; faces with six Co(2,2)Ta2Co8Mo2 cuboctahedra; and faces with ten equivalent Co(1)Ta2Co8Mo2 cuboctahedra.