Phosphorite - Wikipedia - Can You Judge Phosphate by Its Color? | eKonomics
the majority is a sedimentary phosphate ore characterized by a mid-low grade and a cryptocrystalline ...Rock phosphate is a naturally occurring ore of marine sedimentary origin. It may have a composition of 0-30-0 animal fodder phosphate rock or rock phosphate is a non-detrital sedimentary rock which contains high amounts of phosphate bearing minerals. The phosphate content of phosphorite is at least 15 to 20%; if it is assumed that the phosphate minerals in phosphorite are hydroxyapatite and fluoroapatite,
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