AM_Anhydrite_1 Formula: Ca S O4 Name: Anhydrite Unit cell: 12.0777 6.9723 6.304 90.0 90.0 90.0 , V=530.86 Space group: C222 (21)

Bezou C , Nonat A , Mutin J C , Christensen A N , Lehmann M S , Journal of Solid State Chemistry , 117 (1995) p.165-176, Of the crystal structure of gamma-CaSO4, CaSO4*0.5(H2O), and CaSO4*0.6(H2O), by powder diffraction methods, Locality: Maurienne, France