Tb2Ni2Al crystallizes in the orthorhombic Immm space group. Tb(1) is bonded in a 10-coordinate geometry to six equivalent Ni(1) and four equivalent Al(1) atoms. Ni(1) is bonded in a 9-coordinate geometry to six equivalent Tb(1), one Ni(1), and two equivalent Al(1) atoms. Al(1) is bonded to eight equivalent Tb(1) and four equivalent Ni(1) atoms to form a mixture of distorted edge and face-sharing AlTb8Ni4 cuboctahedra.
Tb2Ni2Al crystallizes in the orthorhombic Immm space group. Tb(1) is bonded in a 10-coordinate geometry to six equivalent Ni(1) and four equivalent Al(1) atoms. There are two shorter (2.85 Å) and four longer (2.96 Å) Tb(1)-Ni(1) bond lengths. There are two shorter (3.17 Å) and two longer (3.23 Å) Tb(1)-Al(1) bond lengths. Ni(1) is bonded in a 9-coordinate geometry to six equivalent Tb(1), one Ni(1), and two equivalent Al(1) atoms. The Ni(1)-Ni(1) bond length is 2.51 Å. Both Ni(1)-Al(1) bond lengths are 2.53 Å. Al(1) is bonded to eight equivalent Tb(1) and four equivalent Ni(1) atoms to form a mixture of distorted edge and face-sharing AlTb8Ni4 cuboctahedra.