Apatite Rock Phosphate
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- Apatite Rock Phosphate
Eppawala rock phosphate (ERP) is a locally available natural resource containing about 28% to 40% of P 2 O 5 depending on the mining technique and the nature of apatite crystals in the matrix ...
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The original source of most soil P is from the primary mineral apatite, or rock phosphate (RP). Apatite is a highly insoluble Ca-phosphate compound with the general formula of …
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Apatite, any member of a series of phosphate minerals, the world's major source of phosphorus, found as variously coloured glassy crystals, masses, or nodules. If not for its softness (Mohs hardness 5, compared with the 7 …
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Phosphate rock in Egypt is composed primarily of apatite as the main mineral in composition while non-phosphatic minerals usually include quartz, calcite, dolomite, and clay minerals (El-Anwar et al. 2019). Apatite mineral is insoluble and so the mineral cannot be applied directly as a fertilizer except under conditions of acidic soils.
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The significant role in high-tech and green technologies, recent outstripping demand, and constrained global supply of rare earth elements (REEs) have led to the exploration of phosphate deposits worldwide as a sustainable source for the recovery of REEs as by-products. In this context, the Eppawala Phosphate Deposit (EPD) in Sri …
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The structure of apatite is tolerant to a wide range of substitutions (Table 1).Some of the large substituent cations are accommodated preferentially either in the ninefold-coordinated Ca1 site, or the Ca2 site coordinated by six oxygens and F (± OH ± Cl).Element partitioning between Ca1 and Ca2 in chlorapatite differs from that in fluor- …
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Phosphate rock (PR) is an important mineral resource with numerous uses and applications in agriculture and the environment. PR is used in the manufacture of detergents, animal feed, and phosphate (PO 4 3–) fertilizers.Leaching or runoff losses from PR products like PO 4 3– fertilizers, animal feeds, and detergents could cause …
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APATITE AND ROCK PHOSPHATE Indian Minerals Yearbook 2012 (Part- III : Mineral Reviews) 51st Edition APATITE AND ROCK PHOSPHATE (FINAL RELEASE) GOVERNMENT OF INDIA MINISTRY OF MINES INDIAN BUREAU OF MINES Indira Bhavan, Civil Lines, NAGPUR – 440 001 PHONE/FAX NO. (0712) 2565471 PBX : …
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Rock phosphate is a naturally occurring ore of marine sedimentary origin. It may have a composition of 0-30-0, but the grade is noted as 0-3-0, since rock phosphate is sparingly soluble and little of the phosphorus is available to crops. ... Most important of the phosphate rocks are calcium phosphate, Ca 3 (PO 4) 2, apatite, Ca 5 (PO 4) 3 OH ...
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The 2D 31 P-13 C DCP spectrum shown in Fig. 8a exhibits cross peaks between crystalline apatite phosphate resonance at 2.8 ppm (along the vertical axis) and carbon resonances at 51.4 ppm and at 38 ...
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The growth of apatite crystals from amorphous calcium phosphate is an area of intense study. Here, the authors report on the use of high resolution TEM imaging to provide evidence of nucleation ...
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These minerals are present in small amounts in the phosphate rock. Apatite is also used as ore material. Sometimes, it contains rare earth elements in significant amounts, which can be used as an ore of such metals. It is preferable over traditional ores such as monazite.
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The typical composition of phosphate sludge can include Phosphate (often in the form of calcium phosphate) - main constituent, Silica, Clay, Calcium, Iron, …
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Apatite is slowly soluble in neutral or alkaline waters, and its solubility increases with increasing acidity, decreasing hardness, and decreasing temperature. Apatite may survive rock weather ing for a time to form a phosphate-rich residuum, but it breaks down under prolonged exposure. Some of it may be redeposited
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The major and primary phosphate mineral at Eppawala is Apatite. Studies revealed that the exploitable phosphate deposit is a secondary formation on an Apatite-bearing carbonate rock. Subsequent weathering has caused relative accumulation of Apatite and other secondary minerals to create the present form of the phosphate ore.
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The largest rock phosphate deposit in Sri Lanka is located at Eppawala in the Anuradhapura District. The solubility of Eppawala rock phosphate (ERP) has been known to be very low [4]. As a result ...
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Apatite is the name of a group of phosphate minerals with similar chemical compositions and physical properties. They are an important constituent of phosphorite, a rock mined for its phosphorus content and used to make …
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APATITE AND ROCK PHOSPHATE 1 Apatite and Rock Phosphate A patite is a group of phosphate minerals and named by German Geologist Abraham Werner in 1786. It is the most abundant crystalline phosphate mineral found as an accessory mineral in practically all kinds of igneous rocks. Sometimes, it is concentrated in pegmatites, metallic veins and
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Marine phosphatization events cause episodic carbonate fluorapatite (CFA) precipitation on seamounts, and are commonly linked to growth hiatuses in ferromanganese (Fe-Mn) crusts.
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The igneous apatite (F-rich) is the omnipresent accessory mineral found in almost. ... is the USGS, which shows that the current global resources of phosphate rock ar e more.
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Reimphoto / Getty Images Apatite (Ca 5 (PO 4) 3 F) is a key part of the phosphorus cycle. It is widespread but uncommon in igneous and metamorphic rocks. Apatite is a family of minerals centered around fluorapatite, or calcium phosphate with a bit of fluorine, with the formula Ca 5 (PO 4) 3 F. Other members of the apatite group have …
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The phosphate rock apatite (PRA) is a kind of calcium phosphate mineral with the percentage of P 2 O 5 lower than 15%. Most of the phosphate ores are consumed in fertilizer production, but the phosphate rock apatite would be characterized with a high cost of production for fertilizer while low-cost for serving as adsorbent [22] .
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Apatite is identified by the chemical formula Ca 5 (PO 4). It forms in hexagonal crystals and is a rock phosphate mineral. Apatite can exist in many different forms, along with other minerals, as long as the base of apatite calcium (Ca 5) and phosphorous (PO4) exist together. There are three common forms of apatite that appear in nature.
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"Apatite" is a field term for unidentified calcium phosphate members of the apatite group. Most "apatite" is fluorapatite, whereas hydroxylapatite is much less common and chlorapatite is very rare. "Apatite" crystals are short to long hexagonal prisms [0001], with {10 1 0} and {10 1 1} dominant; also thick tabular {0001}, frequently in the crystals of …
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Biological apatite is an inorganic calcium phosphate salt in apatite form and nano size with a biological derivation. It is also the main inorganic component of …
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Apatite is the name given to a group of phosphate minerals, usually referring to hydroxylapatite (or hydroxyapatite), fluoroapatite (or fluorapatite), and chloroapatite (or chlorapatite).They are named for the presence of hydroxide (OH-), fluoride (F-), and chloride (Cl-) ions, respectively, in the crystal lattice. These three forms of apatite are …
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Phosphate rocks are by far the most important phosphorus-bearing raw material used in the fertilizer industry. They are the primary source of phosphorus (P), which is an essential element for agriculture …
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Numerous natural and synthetic phosphates materials have been used to immobilize Pb: apatite and hydroxyapatite, biological apatite, rock phosphate, soluble phosphate fertilizers such as monoammonium phosphate, diammonium phosphate, phosphoric acid, biosolids rich in P, phosphatic clay and mixtures.
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The apatite-bearing carbonate rocks at Eppawala, Sri Lanka occur as massive, discontinuous bodies in a Precambrian, high-grade metamorphic terrain, which weather to form economically important phosphate deposits. The ore bodies at Eppawala contain ≤42% P2O5, and citric acid solubility of different components varies from 4 to …
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A group in the Apatite Supergroup which includes hexagonal and pseudohexagonal phosphates, arsenates and vanadates containing the same species-defining cation at both the M1 and M2 sites (Pasero et al 2010). "Apatite" (sensu lato) is often used commonly as the generic name for the members of the group which have not been differentiated into …
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