Materials Data on Na6Sn2B4SO16 by Materials Project
Na6B4Sn2SO16 crystallizes in the cubic Fd-3 space group. The structure is three-dimensional. Na1+ is bonded to six O2- atoms to form distorted NaO6 octahedra that share corners with eight equivalent NaO6 octahedra, edges with two equivalent SnO6 octahedra, and an edgeedge with one SO4 tetrahedra. The corner-sharing octahedra tilt angles range from 61–84°. There are two shorter (2.40 Å) and four longer (2.49 Å) Na–O bond lengths. B3+ is bonded in a trigonal planar geometry to three equivalent O2- atoms. All B–O bond lengths are 1.39 Å. Sn4+ is bonded to six equivalent O2- atoms to form SnO6 octahedra that share edges with six equivalent NaO6 octahedra. All Sn–O bond lengths are 2.09 Å. S6+ is bonded to four equivalent O2- atoms to form SO4 tetrahedra that share edges with six equivalent NaO6 octahedra. All S–O bond lengths are 1.50 Å. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a 1-coordinate geometry to two equivalent Na1+, one B3+, and one Sn4+ atom. In the second O2- site, O2- is bonded to three equivalent Na1+ and one S6+ atom to form distorted edge-sharing ONa3S trigonal pyramids.