Materials Data on La2FeSi3 by Materials Project

Abstract

La2FeSi3 is hexagonal omega structure-derived structured and crystallizes in the hexagonal P-6m2 space group. The structure is three-dimensional. La is bonded to three equivalent Fe and nine Si atoms to form a mixture of edge and face-sharing LaFe3Si9 cuboctahedra. All La–Fe bond lengths are 3.16 Å. There are three shorter (3.16 Å) and six longer (3.24 Å) La–Si bond lengths. Fe is bonded in a 3-coordinate geometry to six equivalent La and three equivalent Si atoms. All Fe–Si bond lengths are 2.33 Å. There are three inequivalent Si sites. In the first Si site, Si is bonded in a 9-coordinate geometry to six equivalent La and three equivalent Si atoms. All Si–Si bond lengths are 2.33 Å. In the second Si site, Si is bonded in a 3-coordinate geometry to six equivalent La and three equivalent Fe atoms. In the third Si site, Si is bonded in a 9-coordinate geometry to six equivalent La and three equivalent Si atoms.