AM_Gypsum_1 Formula: Ca S O6 D4 Name: Gypsum Unit cell: 5.6742 15.1236 6.5018 90.0 118.495 90.0 , V=490.36 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 = 150 K