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- Apatite abstract "Apatite is a group of phosphate minerals, usually referring to hydroxylapatite, fluorapatite and chlorapatite, with high concentrations of OH−, F− and Cl− ions, respectively, in the crystal. The formula of the admixture of the four most common endmembers is written as Ca10(PO4)6(OH,F,Cl)2, and the crystal unit cell formulae of the individual minerals are written as Ca10(PO4)6(OH)2, Ca10(PO4)6(F)2 and Ca10(PO4)6(Cl)2.The mineral was named apatite by the German geologist Abraham Gottlob Werner in 1786, although the specific mineral he had described was reclassified as fluorapatite in 1860 by the German mineralogist Karl Friedrich August Rammelsberg. Apatite is a mineral that is often mistaken for other minerals. This tendency is reflected in the mineral's name, which is derived from the Greek word απατείν (apatein), which means to deceive or to be misleading.Apatite is one of a few minerals produced and used by biological micro-environmental systems. 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.Fluorapatite (or fluoroapatite) is more resistant to acid attack than is hydroxyapatite; in the mid-20th century, it was discovered that communities whose water supply naturally contained fluorine had lower rates of dental caries. Fluoridated water allows exchange in the teeth of fluoride ions for hydroxyl groups in apatite. Similarly, toothpaste typically contains a source of fluoride anions (e.g. sodium fluoride, sodium monofluorophosphate). Too much fluoride results in dental fluorosis and/or skeletal fluorosis.Fission tracks in apatite are commonly used to determine the thermal history of orogenic (mountain) belts and of sediments in sedimentary basins. (U-Th)/He dating of apatite is also well established for use in determining thermal histories and other, less typical applications such as paleo-wildfire dating.Phosphorite is a phosphate-rich sedimentary rock, that contains between 18% and 40% P2O5. The apatite in phosphorite is present as cryptocrystalline masses referred to as collophane.".
- Apatite colour Transparency_and_translucency.
- Apatite thumbnail Apatite_crystals.jpg?width=300.
- Apatite wikiPageID "140627".
- Apatite wikiPageLength "14436".
- Apatite wikiPageOutDegree "81".
- Apatite wikiPageRevisionID "707930972".
- Apatite wikiPageWikiLink Abraham_Gottlob_Werner.
- Apatite wikiPageWikiLink Apatite.
- Apatite wikiPageWikiLink Apollo_program.
- Apatite wikiPageWikiLink Bone.
- Apatite wikiPageWikiLink Bone_mineral.
- Apatite wikiPageWikiLink Cabochon.
- Apatite wikiPageWikiLink Calcium.
- Apatite wikiPageWikiLink Calorimetry.
- Apatite wikiPageWikiLink Carbonate.
- Apatite wikiPageWikiLink Category:Calcium_minerals.
- Apatite wikiPageWikiLink Category:Gemstones.
- Apatite wikiPageWikiLink Category:Hexagonal_minerals.
- Apatite wikiPageWikiLink Category:Phosphate_minerals.
- Apatite wikiPageWikiLink Category:Piezoelectric_materials.
- Apatite wikiPageWikiLink Chatoyancy.
- Apatite wikiPageWikiLink Chloride.
- Apatite wikiPageWikiLink Cryptocrystalline.
- Apatite wikiPageWikiLink Crystal.
- Apatite wikiPageWikiLink Dental_caries.
- Apatite wikiPageWikiLink Dental_fluorosis.
- Apatite wikiPageWikiLink Endmember.
- Apatite wikiPageWikiLink Fertilizer.
- Apatite wikiPageWikiLink Fission_track_dating.
- Apatite wikiPageWikiLink Fluorapatite.
- Apatite wikiPageWikiLink Fluorescent_lamp.
- Apatite wikiPageWikiLink Fluoride.
- Apatite wikiPageWikiLink Gemstone.
- Apatite wikiPageWikiLink Geologist.
- Apatite wikiPageWikiLink Helium_dating.
- Apatite wikiPageWikiLink Hexafluorosilicic_acid.
- Apatite wikiPageWikiLink Hexagonal_crystal_system.
- Apatite wikiPageWikiLink Hoidas_Lake.
- Apatite wikiPageWikiLink Hydrofluoric_acid.
- Apatite wikiPageWikiLink Hydrogen_fluoride.
- Apatite wikiPageWikiLink Hydroxide.
- Apatite wikiPageWikiLink Hydroxyl.
- Apatite wikiPageWikiLink Hydroxylapatite.
- Apatite wikiPageWikiLink Ion.
- Apatite wikiPageWikiLink Karl_Friedrich_August_Rammelsberg.
- Apatite wikiPageWikiLink List_of_minerals.
- Apatite wikiPageWikiLink Mineral.
- Apatite wikiPageWikiLink Mineralogy.
- Apatite wikiPageWikiLink Mohs_scale_of_mineral_hardness.
- Apatite wikiPageWikiLink Moon_rock.
- Apatite wikiPageWikiLink Ore.
- Apatite wikiPageWikiLink Orogeny.
- Apatite wikiPageWikiLink Paxillus_involutus.
- Apatite wikiPageWikiLink Phosphate.
- Apatite wikiPageWikiLink Phosphate_minerals.
- Apatite wikiPageWikiLink Phosphoric_acid.
- Apatite wikiPageWikiLink Phosphorite.
- Apatite wikiPageWikiLink Pigment.
- Apatite wikiPageWikiLink Radioactive_waste.
- Apatite wikiPageWikiLink Rare_earth_element.
- Apatite wikiPageWikiLink Rutile.
- Apatite wikiPageWikiLink Sedimentary_basin.
- Apatite wikiPageWikiLink Sedimentary_rock.
- Apatite wikiPageWikiLink Skeletal_fluorosis.
- Apatite wikiPageWikiLink Sodium_monofluorophosphate.
- Apatite wikiPageWikiLink Standard_enthalpy_of_formation.
- Apatite wikiPageWikiLink Suillus_granulatus.
- Apatite wikiPageWikiLink Sulfuric_acid.
- Apatite wikiPageWikiLink Tailings.
- Apatite wikiPageWikiLink Thermal_history_modelling.
- Apatite wikiPageWikiLink Thermodynamics.
- Apatite wikiPageWikiLink Tooth.
- Apatite wikiPageWikiLink Tooth_enamel.
- Apatite wikiPageWikiLink Transparency_and_translucency.
- Apatite wikiPageWikiLink Water_fluoridation.
- Apatite wikiPageWikiLink File:Apatite09.jpg.
- Apatite wikiPageWikiLink File:Apatite_taillée.jpg.
- Apatite wikiPageWikiLink File:Widok_na_Apatyty_z_Chibin.JPG.
- Apatite wikiPageWikiLinkText "'''A'''patite".
- Apatite wikiPageWikiLinkText "Apatite".
- Apatite wikiPageWikiLinkText "Blue apatite".
- Apatite wikiPageWikiLinkText "Calcium hydroxyphosphate".
- Apatite wikiPageWikiLinkText "apatite crystals".
- Apatite wikiPageWikiLinkText "apatite group".
- Apatite wikiPageWikiLinkText "apatite".
- Apatite wikiPageWikiLinkText "phosphate rock".
- Apatite birefringence "0.002".
- Apatite category Phosphate_minerals.
- Apatite cleavage "[0001] indistinct, [1010] indistinct".
- Apatite color "Transparent to translucent, usually green, less often colorless, yellow, blue to violet, pink, brown.".
- Apatite diaphaneity "Transparent to translucent".
- Apatite dispersion "0.013".
- Apatite fluorescence "Yellow stones – purplish-pink, which is stronger in long wave; blue stones – blue to light-blue in both long and short wave; green stones – greenish-yellow, which is stronger in long wave; violet stones – greenish-yellow in long wave, light-purple in short wave.".
- Apatite formula "Ca53".
- Apatite fracture "Conchoidal to uneven".
- Apatite gravity "3.16".
- Apatite habit "Tabular, prismatic crystals, massive, compact or granular".
- Apatite luster "Vitreous to subresinous".
- Apatite mohs "5".