YCo2Ge2 crystallizes in the tetragonal I4/mmm space group. Y(1) is bonded in a 16-coordinate geometry to eight equivalent Co(1) and eight equivalent Ge(1) atoms. Co(1) is bonded to four equivalent Y(1) and four equivalent Ge(1) atoms to form a mixture of distorted edge, face, and corner-sharing CoY4Ge4 tetrahedra. Ge(1) is bonded in a 9-coordinate geometry to four equivalent Y(1), four equivalent Co(1), and one Ge(1) atom.
YCo2Ge2 crystallizes in the tetragonal I4/mmm space group. Y(1) is bonded in a 16-coordinate geometry to eight equivalent Co(1) and eight equivalent Ge(1) atoms. All Y(1)-Co(1) bond lengths are 3.19 Å. All Y(1)-Ge(1) bond lengths are 3.07 Å. Co(1) is bonded to four equivalent Y(1) and four equivalent Ge(1) atoms to form a mixture of distorted edge, face, and corner-sharing CoY4Ge4 tetrahedra. All Co(1)-Ge(1) bond lengths are 2.31 Å. Ge(1) is bonded in a 9-coordinate geometry to four equivalent Y(1), four equivalent Co(1), and one Ge(1) atom. The Ge(1)-Ge(1) bond length is 2.59 Å.