ThNiGe2 crystallizes in the orthorhombic Cmcm space group. Th(1) is bonded in a 14-coordinate geometry to four equivalent Ni(1), four equivalent Ge(2), and six equivalent Ge(1) atoms. Ni(1) is bonded in a 5-coordinate geometry to four equivalent Th(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 six equivalent Th(1), one Ni(1), and two equivalent Ge(1) atoms. In the second Ge site, Ge(2) is bonded in a 8-coordinate geometry to four equivalent Th(1) and four equivalent Ni(1) atoms.
ThNiGe2 crystallizes in the orthorhombic Cmcm space group. Th(1) is bonded in a 14-coordinate geometry to four equivalent Ni(1), four equivalent Ge(2), and six equivalent Ge(1) atoms. All Th(1)-Ni(1) bond lengths are 3.24 Å. There are two shorter (3.16 Å) and two longer (3.17 Å) Th(1)-Ge(2) bond lengths. There are four shorter (3.20 Å) and two longer (3.26 Å) Th(1)-Ge(1) bond lengths. Ni(1) is bonded in a 5-coordinate geometry to four equivalent Th(1), one Ge(1), and four equivalent Ge(2) atoms. The Ni(1)-Ge(1) bond length is 2.32 Å. There are two shorter (2.40 Å) and two longer (2.41 Å) Ni(1)-Ge(2) bond lengths. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 9-coordinate geometry to six equivalent Th(1), one Ni(1), and two equivalent Ge(1) atoms. Both Ge(1)-Ge(1) bond lengths are 2.53 Å. In the second Ge site, Ge(2) is bonded in a 8-coordinate geometry to four equivalent Th(1) and four equivalent Ni(1) atoms.