KnowraAnhydriteLinked fromLinked fromThe 6 pages that link to Anhydrite, each with the reason it gives.All 6Broader topic 4Compared with 2Crystal waterBroader topic: It can form when gypsum loses its two waters of crystallization.Calcium sulfateBroader topic: It is the water-free mineral form, contrasting with gypsum’s crystal-bound water.Sulfate mineralBroader topic: Its composition contrasts with gypsum’s: anhydrite contains no water in its crystal structure.ZechsteinBroader topic: Anhydrite occurs in Zechstein evaporite cycles alongside salt and carbonate rocks.