Materials Data on Eu(GaGe2)2 by Materials Project

Abstract

EuGa2Ge4 crystallizes in the orthorhombic Cmcm space group. The structure is three-dimensional. Eu is bonded in a 6-coordinate geometry to six equivalent Ga and eight Ge atoms. There are two shorter (3.25 Å) and four longer (3.58 Å) Eu–Ga bond lengths. There are four shorter (3.44 Å) and four longer (3.60 Å) Eu–Ge bond lengths. Ga is bonded in a 7-coordinate geometry to three equivalent Eu, one Ga, and three Ge atoms. The Ga–Ga bond length is 2.49 Å. There are one shorter (2.50 Å) and two longer (2.53 Å) Ga–Ge bond lengths. There are two inequivalent Ge sites. In the first Ge site, Ge is bonded in a 2-coordinate geometry to two equivalent Eu, two equivalent Ga, and two Ge atoms. Both Ge–Ge bond lengths are 2.53 Å. In the second Ge site, Ge is bonded in a 1-coordinate geometry to two equivalent Eu, one Ga, and three Ge atoms. Both Ge–Ge bond lengths are 2.55 Å.