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HfRh is Tetraauricupride structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Hf is bonded in a body-centered cubic geometry to eight equivalent Rh atoms. All Hf–Rh bond lengths are 2.84 Å. Rh is bonded in a body-centered cubic geometry to eight equivalent Hf atoms.
Hf3Rh5 crystallizes in the orthorhombic Pbam space group. The structure is three-dimensional. there are two inequivalent Hf sites. In the first Hf site, Hf is bonded in a 10-coordinate geometry to ten Rh atoms. There are a spread of Hf–Rh bond distances ranging from 2.69–2.99 Å. In the second Hf site, Hf is bonded in a body-centered cubic geometry to eight Rh atoms. There are a spread of Hf–Rh bond distances ranging from 2.66–2.81 Å. There are three inequivalent Rh sites. In the first Rh site, Rh is bonded in a 6-coordinate geometry to six Hf atoms. In the second Rh site, Rh is bonded in a 5-coordinate geometry to five Hf atoms. In the third Rh site, Rh is bonded in a 6-coordinate geometry to six Hf atoms.
Hf2Rh crystallizes in the cubic Fd-3m space group. The structure is three-dimensional. there are two inequivalent Hf sites. In the first Hf site, Hf is bonded in a 6-coordinate geometry to six equivalent Rh atoms. All Hf–Rh bond lengths are 2.78 Å. In the second Hf site, Hf is bonded in a 2-coordinate geometry to four equivalent Rh atoms. There are two shorter (2.71 Å) and two longer (3.17 Å) Hf–Rh bond lengths. Rh is bonded in a 9-coordinate geometry to nine Hf atoms.