AM_Gypsum_9 Formula: Ca S O6 H4 Name: Gypsum Unit cell: 6.162 14.965 5.58 90.0 115.38 90.0 , V=464.89 Space group: C12/C1 (15)

Comodi P , Nazzareni S , Zanazzi P F , Speziale S , American Mineralogist , 93 (2008) p.1530-1537, High-pressure behavior of gypsum: A single-crystal X-ray study, Locality: Valle di Caramanico, Abruzzo, Italy, Note: P = 3.15 GPa