#Calcium Sulfate Hydrate (Gypsum), CaS04*2H20 #Monoclinic, C2/c (15), Z = 4. The structure was determined by Wooster [1936] and refined #by Atoji and Rundle [1958]. #Lattice constants of this sample #a = 6.2845(11), b = 15.2079(15), c = 5.6776(7), beta = 114.09(1) #a/b = 0.4132, c/b = 0.3733 #Volume 495.37 A 3 11.59 20.72 23.40 28.11 29.11 31.10 32.07 32.75 33.35 34.51 35.39 35.97 36.25 36.62 37.35 39.29 40.63 42.15 43.34 43.60 44.18 44.56 45.51 46.22 47.84 48.39