Apatite is the most abundant phosphate mineral which include more than 95% of al phosphorus in the Earth´s crust. The seventh chapter of this book provides brief description of sedimentary and igneous phosphate rocks and introduces basic ideas for characterization and classification of phosphate rocks. The chapter continues with …

Phosphorus is a biocritical element that cycles almost exclusively through solid and liquid phases at the Earth's surface. However, its cycling in subduction zones is not fully understood. Apatite is the primary phosphate mineral in basaltic rocks and is common in subduction-related exhumed metamorphic rocks.

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Apatite Meaning and Properties | Beadagebeadage

Stone make up for my right kidney was 70% calcium phosphate (apatite) 20% struvite and 10% calcium carbonate. I had two 24 urine tests, Dr said they were pretty good. One day citrate was borderline low and one day sodium was a little high. PH was nearly 7 on both days. Dr Suggested trying to increase citrate and reduce sodium, which …

Abstract. Sludge contains a high content of phosphorus (P) which makes the recovery of P from this material attractive. Inorganic apatite phosphorus (AP) could be …

The solubility of apatite in anatectic melt plays an important role in controlling the trace-element compositions and isotopic signatures of granites. The compositions of glassy melt inclusions and nanogranitoids in migmatites and granulites are compared with the results of experimental studies of apatite solubility to evaluate the factors that influence apatite …

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.

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 not readily …

However, despite their requisite function in building bone and decades of observations describing intracellular calcium phosphate, the precise role osteoblasts play in mediating bone apatite formation remains largely unknown. To better understand the relationship between intracellular and extracellular mineralization, we combined a sample ...

Apatite is a member of a group of structurally related minerals having compositions symbolized A5 ( B O 4) 3X, in which A is a metal, commonly calcium or lead; B is phosphorus, vanadium, or arsenic; and X is …

Phosphorus is removed from the ocean by sedimentation of organic matter, and the subsequent conversion of organic phosphorus to phosphate minerals such as apatite, and ultimately phosphorite ...

The relationship between infections and renal calculi has been known since the time of Hippocrates, but it was not until 1817 that Marcet identified the connection between urinary alkalinity, infection, phosphate calculi, and increased urinary ammonia. In 1901, Brown first suggested that urea splitting bacteria activity increased urinary …

The phosphorus (P) present in apatitic materials is largely in forms that are not readily available for most arable crops. Many attempts have been made to increase the dissolution of phosphate rock. Hence, soluble P or superphosphate used as fertilizer has been produced by the industrial acidification of apatite (Becker, 1980).

The existence of apatite exsolution lamellae in garnet supports earlier suggestions that garnet is a major repository for P in the mantle, and that P is strongly coupled to Na+Ti. The bulk P content (∼250 ppm) of mantle eclogites is unexpectedly similar to estimates for the P content (130–220 ppm) of the upper mantle; both rocks are ...

1. Introduction. Biological apatite is an inorganic calcium phosphate salt (CaPs) in apatite form with a biological derivation. As the main inorganic component of both bones and teeth, it is distributed in the organic constituents with certain sequence and direction [].By serving as the fillers in such biological tissues, biological apatite is critical …

Apatite is the most abundant phosphate mineral which include more than 95% of al phosphorus in the Earth´s crust. The seventh chapter of this book provides brief description of sedimentary and …

Phosphorus is obtained from the mining of phosphate rocks, mainly the mining of minerals belonging to the apatite group; these ores represent a limited and non-renewable resource [].The composition of apatite, alongside its complex substitution scheme, affects not only the obvious phosphate grade attainable in a concentrate, but …

The maximum phosphorus retention capacity was found to be approximately 7.4 g PO4-P/kg of granulated apatite. The study revealed low kinetic removal rate coefficients.

As a result, phosphate minerals apatite, monazite-(Ce) or xenotime-(Y) are rare, and P is not detected in the alkali feldspars of the A-type group (Table 2). 4.1.4. Post-orogenic specialized S-type granites. Alkali feldspar is the dominant host phase for P in these granites, especially in their topaz-bearing facies.

Soil fertility and phosphorus management by bone apatite amendment are receiving increasing attention, yet further research is needed to integrate the physicochemical and mineralogical transformation of bone apatite and their impact on the supply and storage of phosphorus in soil. This study has examined bone transformation …

Phosphorus (apatite), which was the focus of this study, is high in the center of the concretion and decreases toward the outside (Fig. 3).

In our apatite saturation model we hence use all available experimental datasets reporting apatite saturation, melt compositions, and which plausibly show equilibrium, including recent experiments from lower temperatures (Sartori et al., 2022, Weidendorfer et al., 2017, Weidendorfer and Asimow, 2022; see Table 1 and Fig. 2 A …

Phosphorus is obtained from the mining of phosphate rocks, mainly the mining of minerals belonging to the apatite group; these ores represent a limited and …

The dominant sedimentary phosphorus forms were detrital apatite P and Al-bound p, whereas the amount of Fe-bound P was low because of anoxic condition. Based on the correlation between TP ...

Here, we report the first occurrence of two (Ca-Y)-phosphate phases in apatite crystals from ancient rocks from both the Barberton greenstone belt and the Pilbara Craton. First, a cubic Ca 3 Y(PO 4 ) 3 phase was observed in a sample of silicified tuff from the Mendon Formation from the Barberton greenstone belt.

Phosphorus (P) is the key nutrient thought to limit primary productivity on geological timescales, and hence P bioavailability exerted a major influence on Earth's surface oxygenation dynamics ...

To investigate the relationship between intracellular calcium phosphate accumulations and extracellular bone apatite formation, we cultured mouse calvarial osteoblasts and marrow stromal cells (MSC) in osteogenic medium according to standard in vitro methods for bone-like nodule formation ().We have previously demonstrated by multivariate analyses of …

Phosphorus 18.25 % P 41.82 % P 2 O 5 Hydrogen 0.07 % H 0.59 % H 2 O Chlorine 2.32 % Cl 2.32 % Cl ... Apatite Robertsite Carbonate-hydroxylapatite. Comments: Black crystals of Robertsite on pink carbonate-hydroxylapatite. Location: Tip Top mine, Custer, ...

An apatite solubility model based on martian compositions will be needed to further explore this. This is reasonable as apatite has been observed to exist in the terrestrial upper-mantle as well that is locally enriched in phosphorus (e.g., apatite-bearing spinel-peridotite xenoliths within Victorian basanites; Frey and Green, 1974). 4.4.

Apatite is the generic name, which was first introduced by German geologist A.G. Werner. These minerals and their synthetic analogs represent a major class of ionic compounds and the most common …

Agriculture is the major user of mined phosphorus (P), accounting for 80–90% of the world demand for P 1.Increasing population, growing preferences towards meat-based diets and rising demands ...

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 …

The weathering of apatite, the primary phosphorus sink in Earth's exosphere, controls long-term phosphorus availability. If phosphorus is the ultimate controlling nutrient over geologic time scales, then long-term marine NEP is coupled to the release of phosphorus from apatite weathering. The most abundant apatite compositions found in …

A combination of pore water and solid phase analysis was used to determine whether authigenic carbonate fluorapatite (CFA) is currently forming in the sediment at two locations (OMEX I and II) on the North Atlantic continental platform Goban Spur (southwest of Ireland). Results of selective P extractions suggest that an early diagenetic …