Materials Data on NaSi34 by Materials Project

Abstract

Na(Si)34 is beta beryllia-like structured and crystallizes in the cubic F-43m space group. The structure is three-dimensional and consists of four sodium molecules and one Si framework. In the Si framework, there are six inequivalent Si sites. In the first Si site, Si is bonded to four Si atoms to form corner-sharing SiSi4 tetrahedra. There are one shorter (2.35 Å) and three longer (2.37 Å) Si–Si bond lengths. In the second Si site, Si is bonded to four equivalent Si atoms to form corner-sharing SiSi4 tetrahedra. All Si–Si bond lengths are 2.35 Å. In the third Si site, Si is bonded to four equivalent Si atoms to form corner-sharing SiSi4 tetrahedra. In the fourth Si site, Si is bonded to four Si atoms to form corner-sharing SiSi4 tetrahedra. There are three shorter (2.37 Å) and one longer (2.40 Å) Si–Si bond lengths. In the fifth Si site, Si is bonded to four Si atoms to form corner-sharing SiSi4 tetrahedra. The Si–Si bond length is 2.40 Å. In the sixth Si site, Si is bonded to four Si atoms to form corner-sharing SiSi4 tetrahedra.