Materials Data on NdSi2 by Materials Project

Abstract

NdSi2 is hexagonal omega structure-like structured and crystallizes in the tetragonal I4_1/amd space group. The structure is three-dimensional. Nd is bonded to twelve Si atoms to form a mixture of face and edge-sharing NdSi12 cuboctahedra. There are four shorter (3.16 Å) and eight longer (3.19 Å) Nd–Si bond lengths. There are three inequivalent Si sites. In the first Si site, Si is bonded in a 9-coordinate geometry to six equivalent Nd and three Si atoms. There are one shorter (2.38 Å) and two longer (2.40 Å) Si–Si bond lengths. In the second Si site, Si is bonded in a 9-coordinate geometry to six equivalent Nd and three Si atoms. The Si–Si bond length is 2.38 Å. In the third Si site, Si is bonded in a 9-coordinate geometry to six equivalent Nd and three Si atoms.