phosphorus in apatite search results

Phosphorous availability influences the dissolution of ...

Although apatite is the predominant form of mineral phosphorus in the Earth’s crust, biological forms (i.e. dental and skeletal apatite) have received most attention in kinetic studies. Dissolution experiments with fluorapatite under geologically relevant conditions demonstrate that rates are

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Apatite as an interesting seed to remove phosphorus from ...

In parallel, observation of the material by electron microscopy was used to give more precision information about the mechanisms involved. This work reveals the strong chemical affinity between apatites and phosphorus. Compared to other calcareous materials

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Geochemistry of phosphorus and the behavior of apatite ...

The concentration of phosphorus in glassy melt inclusions and rehomogenized nanogranitoids suggests a strong control of melt aluminosity on apatite solubility in peraluminous granites, which is consistent with existing experimental studies.

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Apatite: The mineral apatite information and pictures

Apatite is the most common phosphate mineral, and is the main source of the phosphorus required by plants. The bones and teeth of most animals, including humans, are composed of calcium phosphate, which is the same material as Apatite. (These biological Apatites are almost exclusively the Hydroxylapatite type.) Chemical Formula.

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Apatite and phosphorus in mantle source regions: An ...

Because of the high solubility of apatite in basic magmas, phosphorus can be confidently treated as an incompatible element in peridotite melting models. Such models, in combination with observed characteristics of basic lavas, indicate that the upper mantle contains ∼200 ppm of phosphorus, much less than the chondritic abundance of ∼900 ppm.

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Geochemistry of Uranium in Apatite and Phosphorite

igneous apatite and 0.005 to 0.02 percent of sedimentary marine apatite. Marine reworked apatite becomes enriched in uranium to as much as 0.1 percent. This is demonstrated by the greater uranium content of the texturally more complex phases within a single deposit. Uranium can be secondarily leached from or introduced into

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Apatite Dissolution Kinetics and the Long-Term Phosphorus ...

Apatite Dissolution Kinetics and the Long-Term Phosphorus Cycle ... Apatite Dissolution Kinetics and the Long-Term Phosphorus Cycle. 2013. Fred Mackenzie. Download PDF. Download Full PDF Package. This paper. A short summary of this paper. 37 Full PDFs related to this paper. Read Paper.

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The role of intracellular calcium phosphate in osteoblast ...

Aug 28, 2012  However, recent insights into the role of amorphous mineral precursors in bone mineralization , and our and other’s observations of intracellular calcium and phosphorus-containing vesicles, suggests that active transport of mineral from the intra- to the extracellular space may play a role in bone apatite formation.

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Apatite: From Crystals to Phosphate Rock Rock Gem Magazine

Nov 05, 2020  In the form of apatite, phosphorus is essential to plant life for growth and photosynthesis, and to animal life as a vital component of genes, teeth, bones, and muscles. Fluorapatite, the hardest, most durable and abundant, of the three apatite minerals, is the primary component of vertebrate bones and teeth.

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Phosphorus Basics: Understanding Phosphorus Forms and ...

Oct 25, 2021  Examples of primary phosphorus minerals include apatite, strengite, and variscite. The secondary phosphorus minerals include calcium (Ca), iron (Fe), and aluminum (Al) phosphates. The release of phosphorus from this pool is extremely slow and occurs when the mineral weathers and dissolves in soil water.

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Apatite: Its uses as a mineral and gemstone

What is Apatite? 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 fertilizers, acids, and chemicals. Apatite has a relatively consistent hardness and serves as the index mineral for a hardness of five in the Mohs Hardness Scale.

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Intelligent Control System Architecture for Phosphorus ...

Analysis of the potential of extracting phosphorus from apatite-nepheline ore waste testifies that, e.g., the dumps of the Apatit JSC (P 2 O 5 of about 0.3 to 0.5%) can yield an apatite product with a phosphorus content of 25 to 30% after processing. This phosphorus concentration is fairly sufficient for agricultural needs.

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Geochemistry of phosphorus and the behavior of apatite ...

The concentration of phosphorus in glassy melt inclusions and rehomogenized nanogranitoids suggests a strong control of melt aluminosity on apatite solubility in peraluminous granites, which is consistent with existing experimental studies.

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Geochemistry of phosphorus and the behavior of apatite ...

concentration of phosphorus in . glassy melt inclusions . and rehomogenized . 19. nanogranitoids suggests a strong control of melt aluminosity on apatite solubility in . 20. peraluminous granites, which is consistent with . existing. experimental studies. However, 21. m. easured c. oncentrations of phosphorus in melt inclusions and ...

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Apatite dissolution kinetics and the long-germ phosphorus ...

Apatite is the primary exogenic sink of phosphorus (P). The weathering of apatite contained in continental rocks and sediments compensates for the P loss via sediment subduction over geologic time scales. P availability may control marine net ecosystem production over geologic time scales and thus apatite weathering rates may control long-term ...

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A key role for iron-bound phosphorus in authigenic apatite ...

A key role for iron-bound phosphorus in authigenic apatite formation in North Atlantic continental platform sediments November 1996 Journal of Marine Research 54(6):1179-1205

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Apatite: Its uses as a mineral and gemstone

What is Apatite? 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 fertilizers, acids, and chemicals. Apatite has a relatively consistent hardness and serves as the index mineral for a hardness of five in the Mohs Hardness Scale.

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A key role for iron-bound phosphorus in authigenic apatite ...

The Journal of Marine Research, one of the oldest journals in American marine science, publishes peer-reviewed research articles covering a broad array of topics in physical, biological and chemical oceanography.Articles that deal with processes, as well as those that report significant observations, are welcome. Biological studies involving coupling between ecological and physical processes ...

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A key role for iron-bound phosphorus in authigenic apatite ...

Journal of Marine Research, 54, 1179-l 2051996 A key role for iron-bound phosphorus in authigenic apatite formation in North Atlantic continental platform sediments

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Phosphate Minerals

Therefore, phosphorus fertilizers are produced by acidulating rock phosphate, ore containing apatite of either the hydroxyapatite, fluorapatite, or francolite (carbonate) varieties, by one of two general schemes: Either sulfuric acid sufficient to produce a mixture of monocalcium phosphate and gypsum [the mixture marketed as "superphosphate ...

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Phosphorus - Nutrient Management Mosaic Crop Nutrition

Inorganic forms of soil phosphorus consist of apatite (the original source of all phosphorus), complexes of iron and aluminum phosphates, and phosphorus absorbed onto clay particles. The solubility of these phosphorus compounds as well as organic phosphorus is extremely low, and only very small amounts of soil phosphorus are in solution at any ...

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Phosphorus cycle - Wikipedia

The availability of phosphorus in an ecosystem is restricted by the rate of release of this element during weathering. The release of phosphorus from apatite dissolution is a key control on ecosystem productivity. The primary mineral with significant phosphorus content, apatite [Ca 5 (PO 4) 3 OH] undergoes carbonation.

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Phosphorous Content Of Apatite

Apatite - Phosphate Minerals. 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.

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Temporal tracking of quantum-dot apatite across in vitro ...

Sep 28, 2020  We developed a technique to tag rock phosphorus (P) apatite with fluorescent quantum-dot (QD) nanoparticles of three different colors, allowing us to study nutrient transfer in an in vitro fungal network formed between two host roots of different ages and different P demands over a 3-week period. Using confocal microscopy and raster image ...

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Geochemistry of phosphorus and the behavior of apatite ...

concentration of phosphorus in . glassy melt inclusions . and rehomogenized . 19. nanogranitoids suggests a strong control of melt aluminosity on apatite solubility in . 20. peraluminous granites, which is consistent with . existing. experimental studies. However, 21. m. easured c. oncentrations of phosphorus in melt inclusions and ...

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Phosphorous Content Of Apatite

Apatite - Phosphate Minerals. 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.

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The Significance of Apatite Inclusions in Soil Phosphorus ...

of apatite, i.e., whether present as separate grains of apatite or as inclusions within other minerals. In a study of the amounts and distribution of the forms of inorganic phosphorus in a New Zealand chronosequence of soils developed on windblown sand, it was found that included apatite was the dominant form of phosphorus in the parent

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Apatite and phosphorus in mantle source regions: An ...

Because of the high solubility of apatite in basic magmas, phosphorus can be confidently treated as an incompatible element in peridotite melting models. Such models, in combination with observed characteristics of basic lavas, indicate that the upper mantle contains ∼200 ppm of phosphorus, much less than the chondritic abundance of ∼900 ppm.

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Apatite Mineral Physical - Optical Properties ...

As a mineral, apatite is chiefly used as a phosphorus source for the manufacture of fertilizers. One of the primary physical properties of apatite is that, in its mineral form, apatite is very stable and does not easily dissolve in a natural environment. In their mineral forms, all apatite have the ability to absorb radioactive and metallic ...

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Which Minerals Include Phosphate? - ThoughtCo

Feb 13, 2019  Apatite. 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 chlorine or hydroxyl that ...

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Microbial sequestration of phosphorus in anoxic upwelling ...

Jul 18, 2010  Phosphorus is removed from the ocean by sedimentation of organic matter, and the subsequent conversion of organic phosphorus to phosphate minerals such as apatite

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Phosphate Minerals

Therefore, phosphorus fertilizers are produced by acidulating rock phosphate, ore containing apatite of either the hydroxyapatite, fluorapatite, or francolite (carbonate) varieties, by one of two general schemes: Either sulfuric acid sufficient to produce a mixture of monocalcium phosphate and gypsum [the mixture marketed as "superphosphate ...

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Understanding Phosphorus Forms and Their Cycling in the

phosphorus minerals include apatite, strengite, and variscite. The secondary phosphorus minerals include calcium (Ca), iron (Fe), and aluminum (Al) phosphates. The release of phosphorus from this pool is extremely slow and occurs when the mineral weathers and dissolves in soil water.

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Vietnam Apatite Phosphorus joint stock company

Vietnam Apatite Phosphorus Joint Stock Company (VAP JSC) founded in 2014 is one of the leading producers of Yellow Phosphorus and Phosphoric acid in Vietnam. As a subsidiary of Viet nam Apatite Limited Company which produces and supplies most of Apatite in Viet Nam, we have stable input for our product in long term.

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Transformation of phosphorus in the wadden sea: Apatite ...

Between February 1992 and June 1993 the distribution of particulate and dissolved phosphorus in the Ems estuary was investigated in approximately monthly intervals. Furthermore, the phosphorus content of sediments was assessed. These data as well as literature data were used to construct a phosphorus budget of the Ems estuary. Fluxes were dominated by the particulate fraction representing 77% ...

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Phosphorus geochemistry of recent sediments in the South ...

Sep 01, 2006  Organic phosphorus exhibits a subtle increase in the upper 20 cm of the gravity cores, likely due to increases in the primary productivity of the lake. Except for the slight increase in deeper sediments, apatite phosphorus, which is thought to be of detrital origin, remained fairly constant over the length of the cores.

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