NiGe2 crystallizes in the orthorhombic Cmce space group. Ni(1) is bonded in a 9-coordinate geometry to one Ni(1), four equivalent 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 5-coordinate geometry to four equivalent Ni(1) and one Ge(1) atom. In the second Ge site, Ge(2) is bonded to four equivalent Ni(1) atoms to form a mixture of distorted corner and edge-sharing GeNi4 tetrahedra.
NiGe2 crystallizes in the orthorhombic Cmce space group. Ni(1) is bonded in a 9-coordinate geometry to one Ni(1), four equivalent Ge(1), and four equivalent Ge(2) atoms. The Ni(1)-Ni(1) bond length is 2.50 Å. There are two shorter (2.49 Å) and two longer (2.51 Å) Ni(1)-Ge(1) bond lengths. There are two shorter (2.48 Å) and two longer (2.51 Å) Ni(1)-Ge(2) bond lengths. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 5-coordinate geometry to four equivalent Ni(1) and one Ge(1) atom. The Ge(1)-Ge(1) bond length is 2.53 Å. In the second Ge site, Ge(2) is bonded to four equivalent Ni(1) atoms to form a mixture of distorted corner and edge-sharing GeNi4 tetrahedra.