Materials Data on EuMgGa3 by Materials Project

Abstract

MgEuGa3 crystallizes in the tetragonal I-4m2 space group. The structure is three-dimensional. Mg is bonded in a 4-coordinate geometry to four equivalent Eu and eight Ga atoms. All Mg–Eu bond lengths are 3.59 Å. There are four shorter (2.70 Å) and four longer (3.07 Å) Mg–Ga bond lengths. Eu is bonded in a 8-coordinate geometry to four equivalent Mg and twelve Ga atoms. There are eight shorter (3.32 Å) and four longer (3.59 Å) Eu–Ga bond lengths. There are two inequivalent Ga sites. In the first Ga site, Ga is bonded in a 2-coordinate geometry to two equivalent Mg, four equivalent Eu, and three Ga atoms. There are one shorter (2.50 Å) and two longer (2.70 Å) Ga–Ga bond lengths. In the second Ga site, Ga is bonded to four equivalent Mg, four equivalent Eu, and four equivalent Ga atoms to form a mixture of face and corner-sharing GaEu4Mg4Ga4 cuboctahedra.