Materials Data on Sr2Eu3Ge10 by Materials Project

Abstract

Sr2Eu3Ge10 is High Pressure (4-7GPa) Tellurium-derived structured and crystallizes in the trigonal P-3m1 space group. The structure is three-dimensional. Sr is bonded to six Ge atoms to form SrGe6 octahedra that share corners with three equivalent GeEu3Ge3 octahedra, edges with three equivalent GeEu3Ge3 octahedra, and edges with six equivalent SrGe6 octahedra. The corner-sharing octahedral tilt angles are 18°. There are three shorter (3.16 Å) and three longer (3.17 Å) Sr–Ge bond lengths. There are two inequivalent Eu sites. In the first Eu site, Eu is bonded to six Ge atoms to form EuGe6 octahedra that share corners with three equivalent GeEu3Ge3 octahedra, edges with three equivalent GeEu3Ge3 octahedra, and edges with six equivalent EuGe6 octahedra. The corner-sharing octahedral tilt angles are 17°. There are three shorter (3.12 Å) and three longer (3.14 Å) Eu–Ge bond lengths. In the second Eu site, Eu is bonded to six equivalent Ge atoms to form EuGe6 octahedra that share corners with six equivalent GeEu3Ge3 octahedra, edges with six equivalent EuGe6 octahedra, and edges with six equivalent GeEu3Ge3 octahedra. The corner-sharing octahedral tilt angles are 17°. All Eu–Ge bond lengths are 3.14 Å. There are five inequivalent Ge sites. In the first Ge site, Ge is bonded to three equivalent Eu and three equivalent Ge atoms to form distorted GeEu3Ge3 octahedra that share corners with three equivalent EuGe6 octahedra, corners with three equivalent GeEu3Ge3 octahedra, edges with three equivalent EuGe6 octahedra, and edges with nine GeEu3Ge3 octahedra. The corner-sharing octahedra tilt angles range from 0–17°. All Ge–Ge bond lengths are 2.62 Å. In the second Ge site, Ge is bonded to three equivalent Eu and three equivalent Ge atoms to form distorted GeEu3Ge3 octahedra that share corners with three equivalent EuGe6 octahedra, corners with three equivalent GeEu3Ge3 octahedra, edges with three equivalent EuGe6 octahedra, and edges with nine equivalent GeEu3Ge3 octahedra. The corner-sharing octahedra tilt angles range from 0–17°. In the third Ge site, Ge is bonded to three equivalent Eu and three equivalent Ge atoms to form distorted GeEu3Ge3 octahedra that share corners with three equivalent SrGe6 octahedra, corners with three equivalent GeEu3Ge3 octahedra, edges with three equivalent SrGe6 octahedra, and edges with nine GeEu3Ge3 octahedra. The corner-sharing octahedra tilt angles range from 0–18°. All Ge–Ge bond lengths are 2.61 Å. In the fourth Ge site, Ge is bonded in a 6-coordinate geometry to three equivalent Sr and three equivalent Ge atoms. All Ge–Ge bond lengths are 2.61 Å. In the fifth Ge site, Ge is bonded in a 6-coordinate geometry to three equivalent Sr and three equivalent Ge atoms.