AM_Hydroniumjarosite_2 Formula: K.2 H6.81 Fe3 S2 O14 Name: Hydroniumjarosite Unit cell: 7.3428 7.3428 17.0316 90.0 90.0 120.0 , V=795.26 Space group: R-3M (166)

Basciano L C , Peterson R C , American Mineralogist , 92 (2007) p.1464-1473, Jarosite - hydronium jarosite solid solution series with, full iron occupancy: Mineralogy and crystal chemistry, Locality: synthetic, Sample: C