Materials Data on ErGe2Ir by Materials Project
ErIrGe2 crystallizes in the orthorhombic Immm space group. The structure is three-dimensional. there are two inequivalent Er sites. In the first Er site, Er is bonded in a 12-coordinate geometry to six equivalent Ir and nine Ge atoms. There are four shorter (3.23 Å) and two longer (3.29 Å) Er–Ir bond lengths. There are a spread of Er–Ge bond distances ranging from 2.94–3.51 Å. In the second Er site, Er is bonded in a 8-coordinate geometry to four equivalent Ir and ten Ge atoms. All Er–Ir bond lengths are 3.16 Å. There are a spread of Er–Ge bond distances ranging from 3.23–3.41 Å. Ir is bonded in a 10-coordinate geometry to five Er and five Ge atoms. There are a spread of Ir–Ge bond distances ranging from 2.47–2.62 Å. There are three inequivalent Ge sites. In the first Ge site, Ge is bonded in a 8-coordinate geometry to four Er, three equivalent Ir, and one Ge atom. The Ge–Ge bond length is 2.71 Å. In the second Ge site, Ge is bonded in a 9-coordinate geometry to six Er, two equivalent Ir, and one Ge atom. The Ge–Ge bond length is 2.48 Å. In the third Ge site, Ge is bonded in a 2-coordinate geometry to five Er and two equivalent Ir atoms.