Materials Data on Eu2Si3Ag by Materials Project

Abstract

Eu2AgSi3 is hexagonal omega structure-derived structured and crystallizes in the orthorhombic Fddd space group. The structure is three-dimensional. there are two inequivalent Eu sites. In the first Eu site, Eu is bonded to two equivalent Ag and ten Si atoms to form a mixture of edge and face-sharing EuSi10Ag2 cuboctahedra. Both Eu–Ag bond lengths are 3.30 Å. There are a spread of Eu–Si bond distances ranging from 3.18–3.36 Å. In the second Eu site, Eu is bonded to four equivalent Ag and eight Si atoms to form a mixture of edge and face-sharing EuSi8Ag4 cuboctahedra. There are two shorter (3.28 Å) and two longer (3.29 Å) Eu–Ag bond lengths. There are a spread of Eu–Si bond distances ranging from 3.28–3.33 Å. Ag is bonded in a 9-coordinate geometry to six Eu and three Si atoms. There are one shorter (2.49 Å) and two longer (2.50 Å) Ag–Si bond lengths. There are two inequivalent Si sites. In the first Si site, Si is bonded in a 9-coordinate geometry to six Eu, one Ag, and two equivalent Si atoms. Both Si–Si bond lengths are 2.35 Å. In the second Si site, Si is bonded in a 9-coordinate geometry to six Eu, one Ag, and two Si atoms. The Si–Si bond length is 2.35 Å.