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Moissan's fluorine cell, from his 1887 publication. Fluorine is a relatively new element in human applications. In ancient times, only minor uses of fluorine-containing minerals existed. The industrial use of fluorite, fluorine's source mineral, was first described by early scientist Georgius Agricola in the 16th century, in the context of ...
Their ultimate origin (from biological sources or geological formation) is unclear. [15] The possibility of small amounts of gaseous fluorine within crystals has been debated for many years. One form of fluorite, antozonite, has a smell suggestive of fluorine when crushed. The mineral also has a dark black color, perhaps from free calcium (not ...
Fluorine is a chemical element; ... Trace quantities of organofluorines of uncertain origin have been detected in volcanic eruptions and geothermal springs. [68]
Fluorine, in the form of fluoride, is considered to be a micronutrient for human health, necessary to prevent dental cavities, and to promote healthy bone growth. [28] The tea plant (Camellia sinensis L.) is a known accumulator of fluorine compounds, released upon forming infusions such as the common beverage. The fluorine compounds decompose ...
Domenico Lino Morichini [1] (23 September 1773 – 19 November 1836) was an Italian physician and chemist. He was the first to identify fluorine in teeth, first in a fossilized elephant tooth and then in human teeth.
Charles Betts, a prominent anti-fluoridationist, charged that fluoridation was "better than using the atom bomb because the atom bomb has to be made, has to be transported to the place it is to be set off while poisonous fluorine has been placed right beside the water supplies by the Americans themselves ready to be dumped into the water mains ...
Fluorine cycle: F fluxes [1] are in Tg/yr and reservoir data [2] is in mg/kg. The major mechanisms that mobilize fluorine are chemical and mechanical weathering of rocks. Major anthropogenic sources also include industrial chemicals and fertilizers, brick manufacturing, and groundwater extra
In this approach, HF is oxidized in the presence of a hydrocarbon and the fluorine replaces C–H bonds with C–F bonds. Perfluorinated carboxylic acids and sulfonic acids are produced in this way. [15] 1,1-Difluoroethane is produced by adding HF to acetylene using mercury as a catalyst. [15] HC≡CH + 2 HF → CH 3 CHF 2