Materials Data on Hf3(CrGa3)2 by Materials Project

Abstract

Hf3(CrGa3)2 crystallizes in the orthorhombic Pmmn space group. The structure is three-dimensional. there are two inequivalent Hf sites. In the first Hf site, Hf is bonded in a 11-coordinate geometry to two equivalent Cr and nine Ga atoms. Both Hf–Cr bond lengths are 2.99 Å. There are a spread of Hf–Ga bond distances ranging from 2.81–3.02 Å. In the second Hf site, Hf is bonded in a 7-coordinate geometry to four equivalent Cr and seven Ga atoms. All Hf–Cr bond lengths are 3.05 Å. There are a spread of Hf–Ga bond distances ranging from 2.69–2.91 Å. Cr is bonded to four Hf, two equivalent Cr, and six Ga atoms to form a mixture of distorted face, edge, and corner-sharing CrHf4Cr2Ga6 cuboctahedra. Both Cr–Cr bond lengths are 2.66 Å. There are a spread of Cr–Ga bond distances ranging from 2.51–2.76 Å. There are four inequivalent Ga sites. In the first Ga site, Ga is bonded in a 5-coordinate geometry to four Hf, two equivalent Cr, and two equivalent Ga atoms. Both Ga–Ga bond lengths are 2.62 Å. In the second Ga site, Ga is bonded in a 1-coordinate geometry to three Hf, four equivalent Cr, and two equivalent Ga atoms. Both Ga–Ga bond lengths are 2.83 Å. In the third Ga site, Ga is bonded in a 12-coordinate geometry to four Hf and four equivalent Cr atoms. In the fourth Ga site, Ga is bonded in a 10-coordinate geometry to five Hf and five Ga atoms. There are one shorter (2.55 Å) and one longer (2.77 Å) Ga–Ga bond lengths.