U2Co3CuGe4 crystallizes in the tetragonal P-4m2 space group. U(1) is bonded in a 16-coordinate geometry to two equivalent Co(1), two equivalent Co(2), two equivalent Co(3), two equivalent Cu(1), four equivalent Ge(1), and four equivalent Ge(2) atoms. There are three inequivalent Co sites. In the first Co site, Co(1) is bonded in a 4-coordinate geometry to four equivalent U(1) and four equivalent Ge(2) atoms. In the second Co site, Co(2) is bonded to four equivalent U(1) and four equivalent Ge(1) atoms to form distorted CoU4Ge4 tetrahedra that share edges with four equivalent Co(2)U4Ge4 tetrahedra and faces with four equivalent Cu(1)U4Ge4 tetrahedra. In the third Co site, Co(3) is bonded in a 4-coordinate geometry to four equivalent U(1) and four equivalent Ge(2) atoms. Cu(1) is bonded to four equivalent U(1) and four equivalent Ge(1) atoms to form distorted CuU4Ge4 tetrahedra that share edges with four equivalent Cu(1)U4Ge4 tetrahedra and faces with four equivalent Co(2)U4Ge4 tetrahedra. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 9-coordinate geometry to four equivalent U(1), two equivalent Co(2), two equivalent Cu(1), and one Ge(2) atom. In the second Ge site, Ge(2) is bonded in a 9-coordinate geometry to four equivalent U(1), two equivalent Co(1), two equivalent Co(3), and one Ge(1) atom.
U2Co3CuGe4 crystallizes in the tetragonal P-4m2 space group. U(1) is bonded in a 16-coordinate geometry to two equivalent Co(1), two equivalent Co(2), two equivalent Co(3), two equivalent Cu(1), four equivalent Ge(1), and four equivalent Ge(2) atoms. Both U(1)-Co(1) bond lengths are 3.15 Å. Both U(1)-Co(2) bond lengths are 3.21 Å. Both U(1)-Co(3) bond lengths are 3.15 Å. Both U(1)-Cu(1) bond lengths are 3.21 Å. All U(1)-Ge(1) bond lengths are 3.13 Å. All U(1)-Ge(2) bond lengths are 3.13 Å. There are three inequivalent Co sites. In the first Co site, Co(1) is bonded in a 4-coordinate geometry to four equivalent U(1) and four equivalent Ge(2) atoms. All Co(1)-Ge(2) bond lengths are 2.35 Å. In the second Co site, Co(2) is bonded to four equivalent U(1) and four equivalent Ge(1) atoms to form distorted CoU4Ge4 tetrahedra that share edges with four equivalent Co(2)U4Ge4 tetrahedra and faces with four equivalent Cu(1)U4Ge4 tetrahedra. All Co(2)-Ge(1) bond lengths are 2.38 Å. In the third Co site, Co(3) is bonded in a 4-coordinate geometry to four equivalent U(1) and four equivalent Ge(2) atoms. All Co(3)-Ge(2) bond lengths are 2.35 Å. Cu(1) is bonded to four equivalent U(1) and four equivalent Ge(1) atoms to form distorted CuU4Ge4 tetrahedra that share edges with four equivalent Cu(1)U4Ge4 tetrahedra and faces with four equivalent Co(2)U4Ge4 tetrahedra. All Cu(1)-Ge(1) bond lengths are 2.38 Å. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 9-coordinate geometry to four equivalent U(1), two equivalent Co(2), two equivalent Cu(1), and one Ge(2) atom. The Ge(1)-Ge(2) bond length is 2.48 Å. In the second Ge site, Ge(2) is bonded in a 9-coordinate geometry to four equivalent U(1), two equivalent Co(1), two equivalent Co(3), and one Ge(1) atom.