— 1. Introduction. Apatite (Ca 5 [PO 4] 3 [F, Cl, OH]) is a ubiquitous accessory mineral in granites. It is a reservoir for rare earth elements (REE), U, Th, and Sr, and volatiles including F, Cl, and S (Piccoli and Candela, 2002, Hughes and Rakovan, 2015).Elements partition into apatite is governed by the composition of the host rock and …

 — Neon Blue Apatite is a captivating gemstone known for its vibrant blue hue that can range from light to deep electric blue. It belongs to the Apatite family, which is a group of phosphate minerals commonly found in igneous and metamorphic rocks. The chemical composition of Apatite includes calcium phosphate combined with fluoride, …

G&G Articles on Apatite 1934-1980. The GIA has published all the G&G's from 1934 until 1980 online. The organization of the list by subject was done by Joseph Gill. Summer 1962, 's-eye apatite, p. 315, 2pp. Summer 1963, Yellow 's-eye apatite, p. 44, 1p. Winter 1965, 's-eye apatite, p. 372, 1p.

 — Most biominerals are inorganic/organic composite materials. 1 This is also the case for the bones and teeth of all vertebrates, which are formed by the combination of an inorganic calcium phosphate phase and an organic matrix 2 ().The inorganic component is a nanocrystalline solid with apatite structure and the chemical composition of a …

 — On the basis of study on the ore property of magnetic ores containing apatite,The experiment results show that a magnetic concentrate having a recovery of 58.04%,a concentrate containing 60.38%Fe ...

 — Apatite may be a minor constituent in magmatic rocks but it is a powerful research tool because it is ubiquitous and it incorporates magmatic water, halogens, S, C, and trace elements including Sr, U, Th, and the rare earth elements. Recent advances in experimental and analytical methodologies allow geologists to analyze apatite textures …

 — Apatite is a field term used to identify calcium phosphate specimens within the entire apatite group [12]. In nature, its main three variants are ranked by their rarity, with fluorapatite being the

 — The technique was checked by means of comparison with the industrial plant practice of apatite and barite flotation, showing its reproducibility and reliability for process development testwork ...

3.1 Copper-Doped apatite Crystal Structure Analysis Figure 1 shows the XRD pattern of the sample, with crystal structure refining by Reflex. As the substitution ratio of Cu in lead apatite increases, there is a decreasing trend in the lattice parameters of the sample. The crystal structure of copper-doped apatite was

RECOVERY OF TAILINGS APATITE PRODUCED IN THE MAGNETIC CONCENTRATION OF IRON ABSTRACT Apatite is the most common phosphate mineral, in addition to being a non-renewable resource it is the only ...

 — Apatite has been recognized as a robust tool for the study of magmatic volatiles in terrestrial and extraterrestrial systems due to its ability to incorporate various volatile components and its common occurrence in igneous rocks. Most previous studies have utilized apatite to study individual magmatic systems or regions. However, volatile …

 — Arsenic is the hazardous species and still is the global challenge in water treatment. Apatite soil is highly rich in arsenic species, and its mining presents various environmental issues. In this study, novel magnetic microbeads as adsorbent were developed for the elimination of hazardous arsenic ions from apatite soil's aqueous …

 — Apatite, as a common accessory mineral found in magmatic–hydrothermal deposits, effectively yields geochemical insights that facilitate our understanding of the mineralization process. In this …

 — Apatite is the most common non-carbonate phase in both intrusive and extrusive carbonatites (see Section 4), but its modal content varies greatly from trace levels to > 50% in cumulate rocks commonly also enriched in magnetite, ferromagnesian silicates, zircon and Nb oxides (e.g., Andersen, 1986, Chakhmouradian et al., 2015, Ray et al., …

 — non-magnetic tailing containing apatite, with grades between 1–3% P 2 O 5 [9]. Flotation is a method based on the difference in physicochemical properties between …

 — non-magnetic tailing containing apatite, with grades between 1–3% P 2 O 5 [9]. Flotation is a method based on the difference in physicochemical properties between valuable minerals and gangue [

 — It is a slow process and thus requires a considerable amount of time. A number of different publications have proposed various methods to filter and assess zircon data (Geisler et al., 2007; Fu et al., 2009; Spencer et al., 2016; Zhong et al., 2018; Tian et al., 2022). These methods will be used, extended, and combined in this study to test ...

 — Magnetic separation technology plays an important role in upgrading such low-grade iron ores, because the magnetic separation process possesses the combined …

 — The object of the study was apatite-nepheline ore of the Khibiny deposits group (Russia) and phosphate ore of the Abu-Tartur deposit (Egypt). For the development of beneficiation schemes and modes, complex studies were carried out on mineral and elemental composition, including optical methods of analysis, electron microscopy using …

 — Interpretation of the mineralizing environment of magnetite-apatite deposits remains controversial with theories that include a hydrothermal or magmatic origin or a combination of those two processes. To address this controversy, we have analyzed the trace element content of magnetite from precisely known geographic locations and …

 — A new biocompatible apatite-wollastonite magnetic glass ceramic has been synthesized via sol-gel process. Characteristics of the materials were determined with differential thermal analysis (DTA ...

 — Apatite is a field term used to identify calcium phosphate specimens within the entire apatite group [12]. In nature, its main three variants are ranked by their rarity, with fluorapatite being the

Synthesis, transport and magnetic properties of Cu-doped apatite Pb10 xCu x(PO4)6O Qiang Hou, Wei Wei, Xin Zhou, Xinyue Wang, Tony Wang, Yue Sun, and Zhixiang Shi. Figure SI1. Resistivity measurement on sample S1. Schematic diagrams of (a) four-probe ... The black curve represents the cooling process, and the red represents the heating …

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Metallic, Ceramic and Polymeric Biomaterials. K. Ishikawa, in Comprehensive Biomaterials, 2011 1.116.4.2 Fast-Setting Apatite Cement. Apatite cement consisting of TTCP and DCPA has become clinically available. However, original apatite cement took 30–60 min to set even though the combination of large TTCP and small DCPA was employed. Setting …

 — Apatite is typically mined using open-pit techniques. It is then processed through a series of stages, including crushing, grinding, sizing, and magnetic separation.

 — Abstract. Apatite may be a minor constituent in magmatic rocks but it is a powerful research tool because it is ubiquitous and it incorporates magmatic water, …

 — The nucleation of carbonate-containing apatite on the biomaterials surface is regarded as a significant stage in bone healing process. In this regard, composites contained hydroxyapatite (Ca10(PO4 ...

According to the thermodynamic outcome (ΔG < -20 kJ/mol), the adsorption process was spontaneous and involved physisorption. These findings demonstrate the potential of magnetic Met-PES/ZVI microbeads as an efficient adsorbent for the removal of arsenic from apatite soil aqueous leachate.

 — Apatite Color Meaning. Apatite comes in various hues including blue, green, yellow, purple, and pink. Each color holds different properties and meanings: Blue Apatite: Blue apatite is often associated …