Definition: Anatase is a mineral found in nature which crystallizes as an anionic precipitate with the same charges as water (OH^-). It's named after the Greek god Anatan, who was the God of Sails. Definition: Anatase is a highly reactive and strongly anionized anhydrous salt crystal that forms when an aqueous solution of calcium phosphate (Ca3(PO4)2) is heated to 160°C for a long period of time in air. It is used as a catalyst in the production of phosphorus in agriculture, chemical industry, and solar cell technology.