#Magnesium Iodate Hydrate, Mg(I03)2-4H20 #Structure Monoclinic, P21/a (14), Z = 2. It was assumed to be isostructural with Co(IO3)2*4H20 and #p-Ni(I03)2-4H20 from a comparison of the powder patterns and the cell sizes. The latter com #pounds were studied by Abrahams et al. [1973]. Preliminary lattice constants for Mg(I03)2-4H2O #were obtained by the use of the axial ratios given by Groth [1908]. #Lattice constants of this sample #a = 8.5063(15), b = 6.6362(15), c = 8.3306(12), beta = 100.59(1) #a/b = 1.2818, c/b = 1.2554 #Volume 462.25 A3 8.18 5.154 4.631 4.174 4.094 3.535 3.478 3.445 3.413 3.318 3.236 3.077 3.052 2.954 2.912 2.826 2.728 2.599 2.577 2.570 2.540 2.525 2.506 2.493 2.397 2.387