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The S 6 O 19 2− ion was obtained both as rubidium and ammonium salt from the reaction of the respective sulfate with SO 3 . It is the largest polysulfate ion known to date and exhibits a chain of six vertex‐connected [SO 4 ] tetrahedra. The unique compound was comprehensively characterized and the bonding within the anion was elucidated by theoretical investigations.
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Schindler et al. (2016) studied this question.
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