AM_Gypsum_2 Formula: Ca S O6 D4 Name: Gypsum Unit cell: 5.6769 15.2074 6.5277 90.0 118.494 90.0 , V=495.28 Space group: I12/A1 (15)

Schofield P F , Knight K S , Stretton I C , American Mineralogist , 81 (1996) p.847-851, Thermal expansion of gypsum investigated by neutron powder diffraction, T = 320 K