Phosphate rock is a general term that refers to rock with high concentration of phosphate minerals, most commonly of the apatite group.
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It occurs in association with crandallite and variscite in fractures in aluminous metamorphic rock, in hydrothermal regions and in phosphate rock deposits.
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Phosphoric acid is reacted with phosphate rock to produce the fertilizer triple superphosphate or with anhydrous ammonia to produce the ammonium phosphate fertilizers.
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"Narau is a phosphate rock island, and its primary economic activity since 1907 has been the export of phosphate mined from the island.
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Hydrographic surveys in the Ashley showed washings of crushed phosphate rock at riverside works had increased shoals and diminished navigation of the river.
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In 2015, fluorosilic acid equivalent to 114, 000 tons of fluorite ( fluorspar ) was produced as a byproduct of phosphate rock processing.
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Nauru is a phosphate rock island, and its primary economic activity since 1907 has been the export of phosphate mined from the island.
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Phosphate rock remains a feedstock in the fertiliser industry, where it is treated with sulfuric acid to produce various " superphosphate " fertiliser products.
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Phosphate rock was abundant in the Soviet Union, but because extraction costs were high most of this mineral was imported from Morocco and Syria.
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The International Fertilizer Development Center ( IFDC ) in a 2010 report estimated that global phosphate rock resources would last for several hundred years.
