phosphate apatite

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Apatite Properties, Occurrence, Uses - Geology Science
2024年7月1日 Apatite is a mineral that is composed of calcium phosphate, with the chemical formula Ca5 (PO4)3 (OH,F,Cl). It is a member of the apatite
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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
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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
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Geochemistry of apatite individuals in Zhijin phosphorites, South
2022年11月1日 The aim was to classify apatite individuals in Zhijin phosphorite, to trace the sources of apatites and REY, and to reveal the authigenic apatite formation and REY
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Apatite Phosphate, Calcium Fluoride Britannica
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 to 9 of most
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Transformation of amorphous calcium phosphate to
2018年10月9日 Herein, we demonstrate a detailed transformation mechanism of amorphous calcium phosphate spherical particles to apatite platelet-like crystals, within the confined nanodomains of a...
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Insight into Biological Apatite: Physiochemical Properties and ...
2013年9月1日 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
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Nano-imaging confirms improved apatite precipitation for high
2021年9月30日 We aim not only to systematically investigate the effect of phosphate/silicate ratio in Na 2 O-free bioactive glasses on in vitro ion release and apatite precipitation upon
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Classification of apatite structures via topological data analysis: a ...
2021年6月2日 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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Phosphate mineral - Wikipedia
Phosphate minerals are minerals that contain the tetrahedrally coordinated phosphate (PO 3− 4) anion, sometimes with arsenate (AsO 3− 4) and vanadate (VO 3− 4) substitutions, along with chloride (Cl −), fluoride (F −), and hydroxide (OH −) anions, that also fit into the crystal structure.. The phosphate class of minerals is a large and diverse group, however, only a few species
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Structure and formation of amorphous calcium phosphate and its
2021年6月1日 We provide a critical review of the chemical composition and structure of synthetic and biogenic (bone/dentin mineral) nanocrystalline hydroxy-carbona
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14.11: Phosphates, Arsenates, and Vanadates
Apatite is a common accessory mineral but only rarely a major rock former. It is common in all igneous rocks, including pegmatites and hydrothermal veins, in metamorphic rocks, and in marine sediments. Varieties Collophane is a
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Kidney stones in adults: Evaluation of the patient with ... - UpToDate
2024年9月10日 The two forms of calcium phosphate include apatite (sometimes reported as carbonate apatite), which is the crystal type found in bone, or calcium hydrogen phosphate (brushite); the frequency of apatite is much greater than brushite. Calcium phosphate crystals in the urine sediment are typically dark and amorphous.
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Apatite from Crystals to Phosphate Rock Rock Gem Magazine
2023年7月1日 Apatite crystals are a favorite among collectors with their stubby, terminated, hexagonal prisms, glassy transparency, and soft, yellow-to-greenish-yellow or blue mineral colors.These beautiful crystals rank high on blue gems and minerals lists.Much is mined in Mexico.. However, most of the apatite in the Earth’s crust occurs not as macrocrystals, but in
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Hydroxyapatite - Wikipedia
The sites occupied solely by phosphate anions in stoichiometric hydroxyapatite, are occupied by phosphate or hydrogen phosphate, HPO 2− 4, anions. [14] Preparation of these calcium-deficient phases can be prepared by precipitation from a mixture of calcium nitrate and diammonium phosphate with the desired Ca/P ratio, for example, to make a sample with a
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Genesis of apatite in phosphate stromatolites - Semantic Scholar
2001年3月1日 Upper Jurassic phosphatic stromatolites associated with condensed pelagic sediments in Alpine-Mediterranean paleomargins mainly consist of microbially precipitated francolite, a low crystallinity carbonate fluorapatite. SEM images of microbial phosphate laminae show highly porous colloform textures formed by dense accumulations of micrometre-size
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Confusion between Carbonate Apatite and Biological Apatite
2022年1月28日 Apatite is recorded as belonging to Nickel–Strunz Class 08: phosphates, arsenates, vanadates, and it is described as 08 BN 05 apatite-(CaOH), apatite-(CaCl), and apatite-(CaF) . In Dana [ 5 ], published in 1997, apatite is described as being in the phosphate mineral group, a large group that includes many mineral species, and the silicate group, which
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CHAPTER 1: Biological Apatites in Bone and Teeth - Royal Society
2015年8月24日 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 carbonated,
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Calcium Phosphate - an overview ScienceDirect Topics
Apatite (Fig. 1.12) is a group of natural calcium mineral±fluorine and chlorine (Ca 5 (PO 4) 3 (F, Cl, OH)). The mineral primarily occurs as phosphate rock. The large apatite deposits are located in China, Canada, the United States, Europe, Russia, and India. Apatite is used as a source of phosphorus, phosphoric acid, and fertilizers.
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Structure and formation of amorphous calcium phosphate and its
2021年6月1日 We provide a critical review of the chemical composition and structure of synthetic and biogenic (bone/dentin mineral) nanocrystalline hydroxy-carbona
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Yellow Apatite : Properties, Formation, Locations - Geology Science
2024年7月1日 Yellow Apatite is a variety of the mineral apatite, which belongs to the phosphate group. Apatite itself is a group of phosphate minerals that are widely distributed in nature and can be found in various geological settings. The yellow color in Yellow Apatite is attributed to the presence of certain trace elements and impurities.
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Confusion between Carbonate Apatite and Biological
2022年1月28日 Apatite is recorded as belonging to Nickel–Strunz Class 08: phosphates, arsenates, vanadates, and it is described as 08 BN 05 apatite-(CaOH), apatite-(CaCl), and apatite-(CaF) . In Dana [ 5 ], published in 1997,
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Neon Blue Apatite : Properties, Formation, Uses - Geology Science
2024年7月12日 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, chloride, or
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CHAPTER 1: Biological Apatites in Bone and Teeth - Royal Society
2015年8月24日 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 carbonated,
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Know your kidney stones I.M. Matters from ACP
Struvite stones, also called “infection stones” or Mg-NH 4 + carbonate-apatite stones, only form when urease-producing bacteria are present in the upper urinary tract, Dr. Curhan noted ... Dr. Curhan said that calcium phosphate stones are his least favorite type because they are difficult to prevent. They are caused by ...
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Bone mineral: new insights into its chemical composition
2019年6月11日 Nano-imaging confirms improved apatite precipitation for high phosphate/silicate ratio bioactive glasses Article Open access 30 September 2021. Calcination and ion substitution ...
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Calcium Phosphate - an overview ScienceDirect Topics
Apatite (Fig. 1.12) is a group of natural calcium mineral±fluorine and chlorine (Ca 5 (PO 4) 3 (F, Cl, OH)). The mineral primarily occurs as phosphate rock. The large apatite deposits are located in China, Canada, the United States, Europe, Russia, and India. Apatite is used as a source of phosphorus, phosphoric acid, and fertilizers.
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Apatite - an overview ScienceDirect Topics
Basically, solubility of apatite is governed by two factors: crystallity and composition. High-crystalline apatite shows more limited solubility than low-crystalline apatite. As stated, apatite formed by the hardening reaction of calcium phosphate is low-crystalline apatite, compared with the sintered apatite which shows high crystallinity.
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Hydroxyapatite - Wikipedia
The sites occupied solely by phosphate anions in stoichiometric hydroxyapatite, are occupied by phosphate or hydrogen phosphate, HPO 2− 4, anions. [14] Preparation of these calcium-deficient phases can be prepared by precipitation from a mixture of calcium nitrate and diammonium phosphate with the desired Ca/P ratio, for example, to make a sample with a
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