AM_Jarosite_8 Formula: (K.76 Na.24) Fe3 S2 O14 H6 Name: Jarosite Unit cell: 7.3045 7.3045 17.0875 90.0 90.0 120.0 , V=789.57 Space group: R-3M (166)

Basciano L C , Peterson R C , American Mineralogist , 93 (2008) p.853-862, Crystal chemistry of the natrojarosite-jarosite and natrojarosite-hydronium, jarosite solid-solution: A synthetic study with full Fe site occupancy, Locality: synthetic, Sample: K