Hf6Os7Al16 crystallizes in the cubic Fm-3m space group. Hf(1) is bonded in a 12-coordinate geometry to four equivalent Os(2), four equivalent Al(1), and four equivalent Al(2) atoms. There are two inequivalent Os sites. In the first Os site, Os(2) is bonded to four equivalent Hf(1), four equivalent Al(1), and four equivalent Al(2) atoms to form a mixture of distorted face and corner-sharing OsHf4Al8 cuboctahedra. In the second Os site, Os(1) is bonded in a body-centered cubic geometry to eight equivalent Al(2) atoms. There are two inequivalent Al sites. In the first Al site, Al(2) is bonded in a 4-coordinate geometry to three equivalent Hf(1), one Os(1), and three equivalent Os(2) atoms. In the second Al site, Al(1) is bonded in a 3-coordinate geometry to three equivalent Hf(1) and three equivalent Os(2) atoms.
Hf6Os7Al16 crystallizes in the cubic Fm-3m space group. Hf(1) is bonded in a 12-coordinate geometry to four equivalent Os(2), four equivalent Al(1), and four equivalent Al(2) atoms. All Hf(1)-Os(2) bond lengths are 3.13 Å. All Hf(1)-Al(1) bond lengths are 2.89 Å. All Hf(1)-Al(2) bond lengths are 3.00 Å. There are two inequivalent Os sites. In the first Os site, Os(2) is bonded to four equivalent Hf(1), four equivalent Al(1), and four equivalent Al(2) atoms to form a mixture of distorted face and corner-sharing OsHf4Al8 cuboctahedra. All Os(2)-Al(1) bond lengths are 2.51 Å. All Os(2)-Al(2) bond lengths are 2.71 Å. In the second Os site, Os(1) is bonded in a body-centered cubic geometry to eight equivalent Al(2) atoms. All Os(1)-Al(2) bond lengths are 2.55 Å. There are two inequivalent Al sites. In the first Al site, Al(2) is bonded in a 4-coordinate geometry to three equivalent Hf(1), one Os(1), and three equivalent Os(2) atoms. In the second Al site, Al(1) is bonded in a 3-coordinate geometry to three equivalent Hf(1) and three equivalent Os(2) atoms.