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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on Na6Mg2C4SO16 by Materials Project

Na6Mg2C4SO16 crystallizes in the cubic Fd-3m space group. The structure is three-dimensional. Na1+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Na–O bond distances ranging from 2.38–2.81 Å. Mg2+ is bonded in an octahedral geometry to six equivalent O2- atoms. All Mg–O bond lengths are 2.07 Å. C4+ is bonded in a trigonal planar geometry to three equivalent O2- atoms. All C–O bond lengths are 1.29 Å. S6+ is bonded in a tetrahedral geometry to four equivalent O2- atoms. 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 distorted single-bond geometry to three equivalent Na1+ and one S6+ atom. In the second O2- site, O2- is bonded in a 5-coordinate geometry to three equivalent Na1+, one Mg2+, and one C4+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Na6Mg2C4SO16 by Materials Project

Na6Mg2C4SO16 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 MgO6 octahedra, and an edgeedge with one SO4 tetrahedra. The corner-sharing octahedra tilt angles range from 61–85°. There are a spread of Na–O bond distances ranging from 2.42–2.52 Å. Mg2+ is bonded to six equivalent O2- atoms to form MgO6 octahedra that share edges with six equivalent NaO6 octahedra. All Mg–O bond lengths are 2.11 Å. C4+ is bonded in a trigonal planar geometry to three equivalent O2- atoms. All C–O bond lengths are 1.30 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 to three equivalent Na1+ and one S6+ atom to form distorted edge-sharing ONa3S trigonal pyramids. In the second O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to two equivalent Na1+, one Mg2+, and one C4+ atom.

36 MATERIALS SCIENCE↗