Tb2Co2Al crystallizes in the orthorhombic Immm space group. Tb(1) is bonded in a 10-coordinate geometry to six equivalent Co(1) and four equivalent Al(1) atoms. Co(1) is bonded in a 9-coordinate geometry to six equivalent Tb(1), one Co(1), and two equivalent Al(1) atoms. Al(1) is bonded to eight equivalent Tb(1) and four equivalent Co(1) atoms to form a mixture of distorted edge and face-sharing AlTb8Co4 cuboctahedra.
Tb2Co2Al crystallizes in the orthorhombic Immm space group. Tb(1) is bonded in a 10-coordinate geometry to six equivalent Co(1) and four equivalent Al(1) atoms. There are two shorter (2.89 Å) and four longer (2.90 Å) Tb(1)-Co(1) bond lengths. There are two shorter (3.18 Å) and two longer (3.21 Å) Tb(1)-Al(1) bond lengths. Co(1) is bonded in a 9-coordinate geometry to six equivalent Tb(1), one Co(1), and two equivalent Al(1) atoms. The Co(1)-Co(1) bond length is 2.42 Å. Both Co(1)-Al(1) bond lengths are 2.52 Å. Al(1) is bonded to eight equivalent Tb(1) and four equivalent Co(1) atoms to form a mixture of distorted edge and face-sharing AlTb8Co4 cuboctahedra.