Original sentence: In anhydrous rubidium rhodizonate, the C6O62− anions are stacked in parallel columns, and so are the rubidium ions.In solution, the acid and the hydrogenrhodizonate ion are mostly hydrated, with some of the ketone groups C=O replaced by geminal hydroxyls, C(OH)2; while the rhodizonate anion is not hydrated
Edited sentence: Anhydrous potassium rhodizonate 2K+ · C6O62− has a distinct but similar structure.Each K ion is arranged so that it connects symmetrically to eight oxygens of four anions, two from each adjacent plane.In anhydrous rubidium rhodizonate 2Rb+ · C6O62−, the rhodizonate anions are stacked in parallel columns, and so are the rubidium ions.In solution, the acid and the hydrogenrhodizonate ion are mostly hydrated, with some of the ketone groups C=O replaced by geminal hydroxyls, C(OH)2.In solution, the rhodizonate anion is not hydrated.Sodium rhodizonate 2Na+ · C6O62− has the same structure, with slightly more distorted anions (0.113 Å rms).The anions and cations are arranged in alternate planes.The anions are planar.The anions are slightly twisted in the "boat" shape (with 0.108 Å of rms deviation from mean plane).Within each plane, the anions are arranged in an haexaginal grid