MgTb2Ni2 crystallizes in the tetragonal P4/mbm space group. Mg(1) is bonded to eight equivalent Tb(1) and four equivalent Ni(1) atoms to form a mixture of distorted corner and face-sharing MgTb8Ni4 cuboctahedra. Tb(1) is bonded in a 6-coordinate geometry to four equivalent Mg(1) and six equivalent Ni(1) atoms. Ni(1) is bonded in a 9-coordinate geometry to two equivalent Mg(1), six equivalent Tb(1), and one Ni(1) atom.
MgTb2Ni2 crystallizes in the tetragonal P4/mbm space group. Mg(1) is bonded to eight equivalent Tb(1) and four equivalent Ni(1) atoms to form a mixture of distorted corner and face-sharing MgTb8Ni4 cuboctahedra. All Mg(1)-Tb(1) bond lengths are 3.29 Å. All Mg(1)-Ni(1) bond lengths are 2.94 Å. Tb(1) is bonded in a 6-coordinate geometry to four equivalent Mg(1) and six equivalent Ni(1) atoms. All Tb(1)-Ni(1) bond lengths are 2.86 Å. Ni(1) is bonded in a 9-coordinate geometry to two equivalent Mg(1), six equivalent Tb(1), and one Ni(1) atom. The Ni(1)-Ni(1) bond length is 2.44 Å.