Sm2Ni2Al crystallizes in the orthorhombic Immm space group. Sm(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 10-coordinate geometry to six equivalent Sm(1), two equivalent Ni(1), and two equivalent Al(1) atoms. Al(1) is bonded to eight equivalent Sm(1) and four equivalent Ni(1) atoms to form a mixture of distorted edge and face-sharing AlSm8Ni4 cuboctahedra.
Sm2Ni2Al crystallizes in the orthorhombic Immm space group. Sm(1) is bonded in a 10-coordinate geometry to six equivalent Ni(1) and four equivalent Al(1) atoms. There are two shorter (2.89 Å) and four longer (3.01 Å) Sm(1)-Ni(1) bond lengths. There are two shorter (3.20 Å) and two longer (3.29 Å) Sm(1)-Al(1) bond lengths. Ni(1) is bonded in a 10-coordinate geometry to six equivalent Sm(1), two equivalent Ni(1), and two equivalent Al(1) atoms. There is one shorter (2.58 Å) and one longer (2.83 Å) Ni(1)-Ni(1) bond length. Both Ni(1)-Al(1) bond lengths are 2.55 Å. Al(1) is bonded to eight equivalent Sm(1) and four equivalent Ni(1) atoms to form a mixture of distorted edge and face-sharing AlSm8Ni4 cuboctahedra.