The adsorption characteristic of organic acid and its effect on the crystalline habit and morphology of α-hemihydrate desulfurization gypsum were investigated.The crystal modification mechanism of organic acids was analyzed by means of adsorption and crystal growth.The results show that organic acid evidently changes the crystalline habit of dihydrate,leading to a large crystal size and transformation of crystal shape from long clavate-like to short columnar-shaped.The short columnar-shaped α-hemihydrate de...