UCoNiGe2 crystallizes in the tetragonal P4/nmm space group. U(1) is bonded in a 16-coordinate geometry to four equivalent Co(1), four equivalent Ni(1), four equivalent Ge(1), and four equivalent Ge(2) atoms. Co(1) is bonded in a 8-coordinate geometry to four equivalent U(1) and four equivalent Ge(1) atoms. Ni(1) is bonded in a 5-coordinate geometry to four equivalent U(1), one Ge(1), and four equivalent Ge(2) atoms. 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), four equivalent Co(1), and one Ni(1) atom. In the second Ge site, Ge(2) is bonded in a 4-coordinate geometry to four equivalent U(1) and four equivalent Ni(1) atoms.
UCoNiGe2 crystallizes in the tetragonal P4/nmm space group. U(1) is bonded in a 16-coordinate geometry to four equivalent Co(1), four equivalent Ni(1), four equivalent Ge(1), and four equivalent Ge(2) atoms. All U(1)-Co(1) bond lengths are 3.02 Å. All U(1)-Ni(1) bond lengths are 3.20 Å. All U(1)-Ge(1) bond lengths are 3.08 Å. All U(1)-Ge(2) bond lengths are 3.21 Å. Co(1) is bonded in a 8-coordinate geometry to four equivalent U(1) and four equivalent Ge(1) atoms. All Co(1)-Ge(1) bond lengths are 2.40 Å. Ni(1) is bonded in a 5-coordinate geometry to four equivalent U(1), one Ge(1), and four equivalent Ge(2) atoms. The Ni(1)-Ge(1) bond length is 2.28 Å. All Ni(1)-Ge(2) bond lengths are 2.36 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), four equivalent Co(1), and one Ni(1) atom. In the second Ge site, Ge(2) is bonded in a 4-coordinate geometry to four equivalent U(1) and four equivalent Ni(1) atoms.