Hf2Ni2Sn crystallizes in the tetragonal P4_2/mnm space group. There are two inequivalent Hf sites. In the first Hf site, Hf(1) is bonded in a 10-coordinate geometry to six equivalent Ni(1) and four equivalent Sn(1) atoms. In the second Hf site, Hf(2) is bonded in a 6-coordinate geometry to six equivalent Ni(1) and four equivalent Sn(1) atoms. Ni(1) is bonded in a 6-coordinate geometry to three equivalent Hf(1), three equivalent Hf(2), and two equivalent Sn(1) atoms. Sn(1) is bonded to four equivalent Hf(1), four equivalent Hf(2), and four equivalent Ni(1) atoms to form a mixture of distorted face and corner-sharing SnHf8Ni4 cuboctahedra.
Hf2Ni2Sn crystallizes in the tetragonal P4_2/mnm space group. There are two inequivalent Hf sites. In the first Hf site, Hf(1) is bonded in a 10-coordinate geometry to six equivalent Ni(1) and four equivalent Sn(1) atoms. There are four shorter (2.65 Å) and two longer (2.73 Å) Hf(1)-Ni(1) bond lengths. All Hf(1)-Sn(1) bond lengths are 3.10 Å. In the second Hf site, Hf(2) is bonded in a 6-coordinate geometry to six equivalent Ni(1) and four equivalent Sn(1) atoms. There are two shorter (2.65 Å) and four longer (2.76 Å) Hf(2)-Ni(1) bond lengths. All Hf(2)-Sn(1) bond lengths are 3.17 Å. Ni(1) is bonded in a 6-coordinate geometry to three equivalent Hf(1), three equivalent Hf(2), and two equivalent Sn(1) atoms. Both Ni(1)-Sn(1) bond lengths are 2.80 Å. Sn(1) is bonded to four equivalent Hf(1), four equivalent Hf(2), and four equivalent Ni(1) atoms to form a mixture of distorted face and corner-sharing SnHf8Ni4 cuboctahedra.