Materials Data on Na6S2O9 by Materials Project
Na6S2O9 crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. Na1+ is bonded in a 5-coordinate geometry to five O2- atoms. There are one shorter (2.31 Å) and four longer (2.45 Å) Na–O bond lengths. S6+ is bonded in a tetrahedral geometry to four equivalent O2- atoms. All S–O bond lengths are 1.49 Å. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in an octahedral geometry to six equivalent Na1+ atoms. In the second O2- site, O2- is bonded in a 4-coordinate geometry to three equivalent Na1+ and one S6+ atom.
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