AM_Hydroniumjarosite_7 Formula: S2 Fe2.919 O14.905 H6 Name: Hydroniumjarosite Unit cell: 7.3559 7.3559 17.0186 90.0 90.0 120.0 , V=797.49 Space group: R-3M (166)

Majzlan J , Stevens R , Boerio-Goates J , Woodfield B F , Navrotsky A , Burns P C , Crawford M K , Amos T G , Physics and Chemistry of Minerals , 31 (2004) p.518-531, Thermodynamic properties, low-temperature heat-capacity anomalies,, and single-crystal X-ray refinement of hydronium jarosite, (H3O)Fe3(SO4)2(OH)6, Note: Single-crystal X-ray diffraction refinement