Mineral Characterisation of some Indian Phosphatic depo-sits and its influence on their processing problems

Phosphatic mineral deposits are extensively used in the manufacture of fertilisers which are so essential for agriculture and also in chemical and other industries. Phosphorus is widely dispersed in the earth's crust but it is most economically concentrated in the form of few mine-rals of which apatite and collophane are of commercial importance. The presence of these minerals are quite appreciable in many magnetite-quartzites, quartz-chlorite schists, rock phosphatic limestones. The naturel sources of phosphorus are phsophatic nodules and guano.