TbNi5 crystallizes in the hexagonal P6/mmm space group. Tb(1) is bonded in a 18-coordinate geometry to six equivalent Ni(1) and twelve equivalent Ni(2) atoms. There are two inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a 9-coordinate geometry to three equivalent Tb(1) and six equivalent Ni(2) atoms. In the second Ni site, Ni(2) is bonded to four equivalent Tb(1), four equivalent Ni(1), and four equivalent Ni(2) atoms to form a mixture of edge, face, and corner-sharing NiTb4Ni8 cuboctahedra.
TbNi5 crystallizes in the hexagonal P6/mmm space group. Tb(1) is bonded in a 18-coordinate geometry to six equivalent Ni(1) and twelve equivalent Ni(2) atoms. All Tb(1)-Ni(1) bond lengths are 2.79 Å. All Tb(1)-Ni(2) bond lengths are 3.11 Å. There are two inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a 9-coordinate geometry to three equivalent Tb(1) and six equivalent Ni(2) atoms. All Ni(1)-Ni(2) bond lengths are 2.40 Å. In the second Ni site, Ni(2) is bonded to four equivalent Tb(1), four equivalent Ni(1), and four equivalent Ni(2) atoms to form a mixture of edge, face, and corner-sharing NiTb4Ni8 cuboctahedra. All Ni(2)-Ni(2) bond lengths are 2.42 Å.