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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on Eu(GeIr)2 by Materials Project

Eu(IrGe)2 crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. Eu is bonded in a 8-coordinate geometry to eight equivalent Ir and eight equivalent Ge atoms. All Eu–Ir bond lengths are 3.38 Å. All Eu–Ge bond lengths are 3.26 Å. Ir is bonded to four equivalent Eu and four equivalent Ge atoms to form a mixture of distorted corner, edge, and face-sharing IrEu4Ge4 tetrahedra. All Ir–Ge bond lengths are 2.48 Å. Ge is bonded in a 9-coordinate geometry to four equivalent Eu, four equivalent Ir, and one Ge atom. The Ge–Ge bond length is 2.66 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on EuGe2Ir by Materials Project

EuIrGe2 crystallizes in the orthorhombic Cmcm space group. The structure is three-dimensional. Eu is bonded in a 12-coordinate geometry to four equivalent Ir and ten Ge atoms. All Eu–Ir bond lengths are 3.36 Å. There are a spread of Eu–Ge bond distances ranging from 3.28–3.42 Å. Ir is bonded in a 9-coordinate geometry to four equivalent Eu and five Ge atoms. There are a spread of Ir–Ge bond distances ranging from 2.43–2.54 Å. There are two inequivalent Ge sites. In the first Ge site, Ge is bonded in a 1-coordinate geometry to six equivalent Eu, one Ir, and two equivalent Ge atoms. Both Ge–Ge bond lengths are 2.59 Å. In the second Ge site, Ge is bonded in a 4-coordinate geometry to four equivalent Eu and four equivalent Ir atoms.

36 MATERIALS SCIENCE↗