How Rock Phosphate Is Formed?
Phosphate rock is formed in oceans in the form of calcium phosphate, called phosphorite. It is deposited in extensive layers that cover thousands of square miles. Originally, the element phosphorus is dissolved from rocks. Some of this phosphorus goes into the soil where plants absorb it; some is carried by streams to the oceans. In the oceans the phosphorus is precipitated Rock Phosphate is a natural rock mined from phosphorus-rich deposits. The rock is washed free from clay impurities and heated to remove moisture. It is then pelletized for easy application.

Dicalcium Phosphate:
Also known as calcium monohydrogen phosphate, is a dibasic calcium phosphate. It is usually found as the dihydrate, but it can be thermally converted to the anhydrous form. It is practically insoluble in water, with a solubility of 0.02 g per 100 mL at 25 °C. It contains about 23 percent calcium in its anyhydrous form, and is mainly used as a dietary supplement in prepared breakfast cereals, enriched flour, and noodle products. It is also used as a tableting agent in some pharmaceutical preparations.

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