Calcium phosphate

Calcium phosphate Ca₃(PO₄)₂ is found in nature as a rock in Morocco, Israel, Egypt, Kola (Russia) and in smaller quantities in some other countries. The natural form is not completely pure, and there are some other components like sand and lime which can change the composition. In terms of P₂O₅, most calcium phosphate rocks have a content of 30 % to 40 % P₂O₅ in weight. Calcium phosphate is a very very important ground product for the production of phosphoric acid and fertilizers. It is also the ground product of the Odda process.