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.

Apatite-(CaOH) Mineral Data

Fleet M E, Liu X, King P L, American Mineralogist, 89 (2004) p.1422-1432, Accommodation of the carbonate ion in apatite: An FTIR and X-ray structure study, of crystals synthesized at 2-4 GPa, Sample: xt374

Introduction to Apatites | IntechOpen

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 crystalline form of calcium phosphates, which are of interest of many industrial branches and scientific disciplines. Since, apatite …

Magmatic Apatite: A Powerful, Yet Deceptive, Mineral

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, 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 …

Biological Properties and Medical Applications of Carbonate Apatite…

Bone mineral belongs to the apatite series; in particular, it is carbonated non-stoichiometric, poor-crystalline, hydroxyl-deficient, and calcium-deficient (with varying Ca/P ratio) apatite, with a carbonate content in the range of 2–9 wt% .

Mineral chemistry and apatite Sr isotope signatures

Apatite is a ubiquitous accessory mineral in hydrothermal ores, which contains a high Sr concentration (up to hundreds to thousands of ppm) and a negligible concentration of Rb, owing to the extremely low partition coefficient of rubidium in apatite of 0.0013 (Prowatke and Klemme, 2006).

Apatite Group: Mineral information, data and localities.

The designation "Apatite Group" has been used with different definitions in the history of mineralogy. The new nomenclature of the apatite supergroup and its divisons in 5 groups, among them the apatite group was approved by the IMA in 2010 (Pasero et al. 2010). A group in the Apatite Supergroup which includes hexagonal and pseudohexagonal ...

Apatite Supergroup: Mineral information, data and localities.

Name: The supergroup has its name after the generic name apatite first introduced by the German mineralogist Abraham Gottlob Werner in 1786 (Gerards 1786). It is derived …

Apatite | Properties, Occurrence, Uses

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Apatite | Phosphate, Calcium & Fluoride | Britannica

apatite. An apatite crystal excavated in Durango, Mex. Apatite is a member of a group of structurally related minerals having compositions symbolized A5 ( B O 4) 3X, in which A …

Activation mechanisms of apatite by purifying reagent polyacrylamide

The apatite content was 98% and other mineral impurities were carbonate minerals. The pure rare earth (PRE) minerals used were bastnaesite and monazite with purity exceeding 97%, and these were obtained by repeated flotation, washing, and screening of rare earth concentrate taken from Bayan Obo Ore, followed by grinding of …

Apatite – Virtual Museum of Molecules and Minerals

Apatite. Apatite has the composition Ca5[PO4]3(OH,F,Cl) and is the major primary mineral source of phosphorous to most soils. It has a hexagonal crystal system and variable composition. Fluorine, hydroxyls, chlorine, and others may substitute in the structure freely, thus forming fluorapatite, hydroxyapatite, chlorapatite, etc. Numerous …

Mineral

Mineral - Hardness, Mohs Scale, Crystalline: Hardness (H) is the resistance of a mineral to scratching. It is a property by which minerals may be described relative to a standard scale of 10 minerals known as the Mohs scale of hardness. The degree of hardness is determined by observing the comparative ease or difficulty with …

Apatite | Geology In

Apatite is the defining mineral for 5 on the Mohs scale. Hydroxyapatite, also known as hydroxylapatite, is the major component of tooth enamel and bone mineral. A relatively rare form of apatite in which most of the OH groups are absent and containing many carbonate and acid phosphate substitutions is a large component of bone material.

Osteopontin regulates biomimetic calcium phosphate crystallization …

NMR measurements show that an appreciable disordered calcium phosphate mineral layer covers the apatite crystallites. From quantification of Ca and P in HAP·qOPN, it is clear that the surface ...

Apatite | Mineralogy4Kids

Apatite. Apatite. Discovered in 1860, this mineral is named from the Greek word "to deceive" as it was often confused with other minerals. It is widely disseminated as an accessory constituent in all classes of rocks: igneous, sedimentary, and metamorphic. Fluorapatite is by far the most common species of this mineral group.

The many facets of apatite

most abundant phosphate mineral. Apatite forms the base of the P cycle, which begins when the (PO 4) 3-phosphate group is released as apatite weathers at the Earth's surface. The mineral occurs in igneous, metamorphic, sedimentary, and hydrothermal rock systems, and is the principal

APATITE (Calcium (Fluoro-, Chloro-, Hydroxyl-) Phosphate)

THE MINERAL APATITE. Chemistry: Ca 5 (PO 4) 3 (OH,F,Cl), Calcium (Fluoro, Chloro, Hydroxyl) Phosphate. Class: Phosphates. Group: Apatite. Uses: as a source of phosphorous to be used in fertilizer, rarely as a gemstone and as …

Mindat

Explore the world of minerals and learn about apatite, a group of phosphate minerals with diverse colors and forms. Find out where apatite is found and how it is used.

Pierre Apatite

Le naturaliste espagnol Pedro Francisco Dávila (1713-1785) décrit le minéral et l'appelle « pierre phosphorique ». Quelques années plus tard, le géologue allemand Abraham Gottlob Werner (1749-1817) se penche sur le sujet. En raison de l'apparence trompeuse de la pierre, Werner lui attribue le nom d'« apatite ».

Structurally Robust, Chemically Diverse: Apatite and Apatite …

Apatite is ubiquitous in igneous, metamorphic, and sedimentary rocks and is significant to more fields of study than perhaps any other mineral. To help understand why, one needs to know apatite's structure, composition, and crystal chemistry. ... giving rise to the "apatite supergroup," which contains over 40 mineral species. The structure ...

Apatite: A Mineral for All Seasons

Apatite is a superb mineral by which to investigate the nature of fluids that have passed through and altered a rock (metasomatic processes). Its ubiquity allows it to act as a reservoir for P, F, Cl, OH, CO2, and the rare earth elements. It is also a powerful thermochronometer and can be chemically altered by aqueous brines (NaCl–KCl–CaCl2 ...

Phosphorus removal from wastewater by mineral apatite

The apatite mineral has proven to be an efficient crystallization seed in promoting calcium phosphate (CaP) precipitation from wastewater (Nancollas and Mohan, 1970;Joko, 1984;Molle et al., 2005).

Apatite

Apatite is the mineral most often involved in replacing soft tissues and it does so with the highest degree of fidelity. Details, down to the subcellular level, such as Cretaceous fish cell nuclei sitting on muscle fibres, have been recorded and such fine detail is possible because the apatite crystallites can be very small (commonly <30 nm). ...

Properties of apatite | Britannica

apatite, A member of the phosphate group of minerals, the world's major source of phosphorus, found as variously coloured, glassy crystals, masses, or nodules. Much of it …

Apatita – Wikipédia, a enciclopédia livre

A apatita ( apatite, em Portugal) é um mineral do grupo dos fosfatos, com as seguintes variantes: hidroxiapatita, fluorapatita, e clorapatita, assim nomeados por causa de altas concentrações de íons Hidróxido (OH - ), Fluoreto (F - ), e Cloreto (Cl - ), respectivamente, em sua estrutura cristalina. Sua fórmula geral (que apenas explicita ...

Mohs Hardness Scale: Testing the Resistance to …

The Mohs Hardness Scale is a set of ten reference minerals (numbered 1 through 10) that are used to determine the relative hardness of minerals and other objects. In this test the hardness of a mineral is defined as …

Apatite-(CaF) Mineral Data

Apatite-(CaF) Beryl Muscovite Apatite Comments: Pink crystals of fluorapatite with pale blue beryl (aquamarine) on books of muscovite crystals. Location: Nagar area, Gilgit district, Northern Areas, Pakistan.

Phosphorus removal from wastewater by mineral apatite

Natural apatite, a mineral found in igneous, sedimentary and metamorphic rocks (Nriagu and Moore, 1984), and in teeths and bones, was shown to favour P-removal from wastewater (Joko, 1984; Jang and Kang, 2002; Molle et al., 2005). The scope of this paper was to test and evaluate the P-removal potential of several apatites found in North …

Apatite Supergroup: Mineral information, data and …

A supergroup that includes minerals with a generic chemical formula IX M1 2VII M2 3 ( IV TO 4) 3 X (Z = 2). A large number of ions may occupy the key sites in the structure, and thus the possible number of distinct minerals is large. The members of the apatite supergroup characteristically show a wide range of substitutional solid solutions.

Apatite

Apatite is a mineral that is commonly found in igneous, metamorphic, and sedimentary rocks. It is made up of calcium phosphate, which is the same mineral that makes up our teeth and bones. Apatite can be identified by its green, blue, or yellow color, and its hardness of 5 on the Mohs scale. It can also be identified by its crystal structure ...

Apatite: A Mineral for All Seasons

Apatite is a superb mineral by which to investigate the nature of fluids that have passed through and altered a rock (metasomatic processes). Its ubiquity allows it to act as a …

Apatite

This mineral is also a biological material. In particular, hydroxylapatite is the main constituent of tooth enamel, and a special form of apatite is found in bone . When toothpastes and water containing fluoride are used, the fluoride ions substitute for hydroxide ions in tooth enamel, making the enamel more resistant to attack by acids.