AM_Gravegliaite Formula: Mn S O6 H6 Name: Gravegliaite Unit cell: 9.763 5.635 9.558 90.0 90.0 90.0 , V=525.83 Space group: PNMA (62)

Basso R , Lucchetti G , Palenzona A , Zeitschrift fur Kristallographie , 197 (1991) p.97-106, Gravegliaite, MnSO3*3H2O, a new mineral from Val Graveglia, (Northern Apennines, Italy), Locality: Gambatesa mine, Val Graveglia, Northern Apennines, Italy