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phosphate rock |
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phosphoriteor phosphate rockRock with a high concentration of phosphates in nodular or compact masses. The phosphates may be derived from a variety of sources, including marine invertebrates that secrete shells of calcium phosphate and the bones and excrement of vertebrates. Typical phosphorite beds contain about 30% phosphorus pentoxide (P2O5) and constitute the primary source of raw materials for phosphate fertilizers. Significant deposits in the U.S. include the Phosphoria Formation in Idaho and the Monterey Formation in California. Major deposits also occur in the Sechura Desert in Peru. phosphate rock [′fä‚sfāt ′räk] (materials) A rock that is naturally high enough in phosphorus to be used directly in fertilizer manufacturing. The beneficiated concentrate of a phosphate deposit. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| That, in turn, set up conditions in which dissolved carbonate and phosphate minerals could more easily precipitate from the solution and accumulate on what remained of the eggs and on other surfaces. The first few chapters begin with the nuts and bolts of phosphate minerals chiefly the structure (Hughes and Rakovan) and composition (Pan and Fleet). Mrose (1983-1999) Phosphate minerals, powder diffraction, crystal data evaluation, single crystal diffraction. |
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