Troilite nano-inclusions in apatite: Implications for melt
The calcium phosphate apatite belongs to the apatite group within the apatite supergroup (Hughes and Rakovan, 2015), with an ideal formula of Ca 5 (PO 4) 3 X, where X = F,Cl,OH.The crystal structure of apatite has been shown to be very complex, especially when other ions substitute Ca and P, and when F and Cl are together in the structure, because the apatite …
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(PDF) Classification of apatite structures via topological …
While the metaprism twist angle is a good indicator of classification for apatite structures 22, our earlier PCA work then showed that it is actually the pairing of twist angles that serve as the primary classification tool 16. This work here then shows that angular combinations provide one perspective of classification but the classification ...
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Nomenclature of the apatite supergroup minerals
The apatite supergroup can be formally divided into five groups, based on crystal-chemical arguments: apatite group, hedyphane group, belovite group, britholite group, and ellestadite …
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Apatite
Apatite - Ca 5 (PO 4) 2 [F, OH, Cl] Apatite structure is characterized by phosphate oxyanion linked by Ca 2+ cations to forma hexagonal frame-work with F-anions lying at the corners of hexagonal cell and coordinated by three Ca 2-cations. Composition of the apatite minerals is highly variable and there is a complete solid solution between three end-members, …
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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 …
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Apatite Eu/Y-Ce discrimination diagram: A big data based …
Apatite comprises rich various trace elements, which are formed in different apatite-generation environments. Constructing apatite-associated trace element discrimination diagrams is a classic and efficient technique for the investigation of apatite provenance. The typical examples include the diagrams of Sr-Y, Sr-Mn, Y-(Eu/Eu * ) and (Ce/Yb) N ...
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Apatite Mineral Data
Apatite Classification: Dana Class: 41.08.01.00 Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen : where (A)5 (XO4)3 Zq : Apatite Group : 41.08.01.00 Apatite* Ca5(PO4)3(OH,F,Cl) P 6 3 /m 6/m : 41.08.01.01 Apatite-(CaF) Ca5(PO4)3F P 6 3 /m 6/m : 41.08.01.02 ...
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Apatite
Apatite is very common as an accessory mineral in igneous and metamorphic rocks, where it is the most common phosphate mineral.However, occurrences are usually as small grains which are often visible only in thin section.Coarsely crystalline apatite is usually restricted to pegmatites, gneiss derived from sediments rich in carbonate minerals, skarns, or marble.
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Apatite Supergroup: Mineral information, data and …
Bromine concentration in samples analyzed by Dong (2005) is on a trace level (e.g., 57 ppm). A single study (Broska et al., 2014) reports a possible trace-amount occurrence of CN-(cyanide) admixture in fluorapatite. Vanadium-rich members of the ellestadite group are observed in pyrometamorphic rocks formed in a burning coal-mining dump (Kruszewski, pers. obs.).
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Machine learning applied to apatite compositions for …
Apatite major and trace element chemistry is a widely used tracer of mineralization as it sensitively ... The classification results suggest that the developed models (accuracy: 0.851–0.992; F1 score: 0.839–0.993) are much more accurate and efficient than conventional methods (accuracy: 0.242–0.553). Feature importance
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Apatites based catalysts: A tentative classification
Rahmanian et al. have prepared a modified apatite for the catalysis of the dehydration of ethanol into diethyl ether [182]. This Al ion doped apatite was obtained by the wet impregnation route using a solution of Al(NO 3) 3 •9H 2 O as a source of aluminium ions and a non-stoichiometric Ca/P = 1.62 HAp. After calcination at 600 °C, the ...
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Classification of apatite structures via topological data …
Using the apatite chemistry as a template, we track through the use of persistent homology the topological connectivity of input crystal chemistry descriptors on defining …
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-Classification des gisements à oxyde de fer ± apatite ± Cu …
Download scientific diagram | -Classification des gisements à oxyde de fer ± apatite ± Cu ± Au métaux rares génétiquement liés à des sources magmatiques. from publication: Les gisements ...
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Apatite enrichment by rare earth elements: A review of the …
Apatite is the main source of phosphate that is mined industrially [2]. ... Nomenclature and Classification (IMA- CNMNC), currently there are only three minerals of the apatite group, ... was selected due to use of the same methodology and equipment. These five studies plus the results from this review were plotted in Fig. 7.
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CLASSIFICATION OF APATITES DISCUSSED IN THIS PAPER …
Two groups of apatite are recognized by morphology and chemical composition: (1) "magmatic" unaltered apatite (Ap-1) in unaltered and slightly altered rocks and (2) "metasomatized" apatite ...
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16.19: Apatite
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.
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A comprehensive review on apatite-derived catalysts for …
Download Citation | On Jan 1, 2024, Boutaina Rezki and others published A comprehensive review on apatite-derived catalysts for sustainable biodiesel production: Classification, features and ...
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Multivariate statistical analysis of trace elements in apatite
This classification is used to constrain the factors controlling magmatic and hydrothermal processes, and the factors related to mineralization. Ore magmatic apatite is defined as apatite in the magmatic rocks genetically related to mineralization, whereas barren magmatic apatite refers to apatite from magmatic rocks not related to ...
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Visual Interpretation of Machine Learning: …
In this study, we introduce a novel visualization technique that combines SDBM and A-MPs to investigate the genesis classification of apatite. Apatite is a ubiquitous accessory mineral in igneous, metamorphic, and clastic …
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Classification and substitution diagram of apatite-group …
Download scientific diagram | Classification and substitution diagram of apatite-group minerals (atomic proportions) from publication: Fluid-driven destabilization of REE-bearing accessory ...
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THE ETYMOLOGY OF THE MINERAL NAME 'APATITE': …
The etymology of 'apatite' The English word 'apatite'derives from the German word Apatit, which first appeared in print in 1786* in the form of a secondary report. German miner-alogist Carl Abraham Gerhard (1738 1821) intro-duced the name, in a list of many names (synonyms) to describe a set of minerals with related character-
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6.1 PHOSPHATE (APATITE)
reclamation. India has inadequate resources of apatite especially of chemical/fertilizer grade. Basis of Grade Classification The following grade classification has been adopted for apatite in National Mineral Inventory as on 01.04.2020. 1. Chemical/Fertilizer (+) 30 % P 2 O 5 2. Blendable 25 to 30% P 2 O 5 3. Soil Reclamation (+) 16% P 2 O 5 4.
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Air Classification Equipment
Air classification equipment is mainly used for processing fine materials with classification size of 0.005–1.5 mm, which is suitable for minerals that cannot be treated by wet process, such as …
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Machine learning applied to apatite compositions for …
The classification results suggest that the developed models (accuracy: 0.851–0.992; F1 score: 0.839–0.993) are much more accurate and efficient than conventional …
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Classification of apatite structures via topological data …
˝e apatite structure is shown in Fig. 1, as well as the traditional structure map plotting of the descriptors. In total for the 29 descriptors, there are 406 total pair-wise structure maps. In ...
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Henan Kellen Machinery Equipment Co.,Ltd
In order to improve the quality of equipment and services; we support the customization of conveyor belts and rotary screens. In addition, the feeding hopper is enlarged and the frame of …
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Nomenclature of the apatite supergroup minerals
The apatite supergroup includes minerals with a generic chemical formula IX M1 2 VII M2 3 (IV TO 4) 3 X (Z = 2); chemically they can be phosphates, arsenates, vanadates, silicates, and sulphates. The maximum space group symmetry is P6 3 /m, but several members of the supergroup have a lower symmetry due to cation ordering and deviations from the ideal …
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Visual Interpretation of Machine Learning: Genetical …
summarizes the collated apatite data. Among the dataset, the 14 most commonly analyzed trace elements, La, Ce, Pr, Nd, Sm, Eu, Gd, Dy, Yb, Lu, Sr, Y, Th, and U, were selected as features to provide a consistent and optimized dataset for the subsequent work. Table 1. Apatite trace element dataset used in this study. Deposit Type Number of ...
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Trace element discrimination diagrams to identify igneous apatite …
Granitoids commonly contain apatite as an accessory mineral (< 1 vol%; Piccoli and Candela, 2002; Webster and Piccoli, 2015), and a few studies show the potential to discriminate apatite from different granite types using its chemical composition.According to the compilation of apatite studies on granites, the granitic host-rock of apatite is generally classified …
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Apatite trace element dataset used in this study.
... dataset covers five common ore deposit types located worldwide, including porphyry, skarn, orogenic Au, iron-oxide copper gold (IOCG), and iron-oxide apatite (IOA or Kiruna type) …
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