Phosphate rock and Phosphorite, calcined

Use

Phosphorite or mineral phosphate is made by grinding rock phosphate, a natural mineral found in the form of sedimentary rocks containing various calcium phosphates. It is used as a phosphatic fertilizer, and is a primary source of phosphorus. It is a mineral containing calcium phosphate with hydroxyl groups or is hydroxy apatite. Phosphorite is a continental phosphatic rock, consisting of concretions of collophanite, found in decalcification clays. The most famous phosphorites are from Causses du Quercy (France).