• WordNet 3.6
    • n fluorine a nonmetallic univalent element belonging to the halogens; usually a yellow irritating toxic flammable gas; a powerful oxidizing agent; recovered from fluorite or cryolite or fluorapatite
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Webster's Revised Unabridged Dictionary
    • n Fluorine flū"ŏr*ĭn or flū"ŏr*ēn (Chem) A non-metallic, gaseous element of atomic number 9, strongly acid or negative, and associated with chlorine, bromine, and iodine, in the halogen group of which it is the first member. It always occurs combined, is very active chemically, and possesses such an avidity for most elements, and silicon especially, that it can neither be prepared nor kept in glass vessels, but may be contained in lead vessels. If set free it immediately attacks a containing glass vessel, so that it was not isolated until 1886. It is a pungent, corrosive, colorless gas. Symbol F. Atomic weight 19.00.Fluorine unites with hydrogen to form hydrofluoric acid, which is the agent employed in etching glass. It occurs naturally, principally combined as calcium fluoride in fluorite, and as a double fluoride of aluminium and sodium in cryolite.
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Chambers's Twentieth Century Dictionary
    • Fluorine an elementary substance allied to chlorine, obtained chiefly from fluor
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Webster's Revised Unabridged Dictionary
NL. fluorina,: cf. G. fluorin, F. fluorine,. So called from its occurrence in the mineral fluorite,
Chambers's Twentieth Century Dictionary
A name given by the alchemists to all mineral acids because of their fluidity, from L. fluĕre, to flow.


In literature:

It is employed in accelerators on account of its fluorine.
"American Handbook of the Daguerrotype" by Samuel D. Humphrey
It appears as if there is at first produced an unstable oxide of fluorine, which rapidly decomposes into fluorine and ozone.
"Scientific American Supplement, No. 832, December 12, 1891" by Various
I place within this group lithium, potassium, rubidium, fluorine, and manganese, because of their similarity in internal composition.
"Occult Chemistry" by Annie Besant and Charles W. Leadbeater
The gas obtained in our experiments is therefore either fluorine or a perfluoride of hydrogen.
"Scientific American Supplement, No. 561, October 2, 1886" by Various
The element fluorine has at last been successfully isolated, and its chief chemical and physical properties determined.
"Scientific American Supplement, No. 633, February 18, 1888" by Various
The gas fluorine becomes a liquid at 210 deg.
"The Last Harvest" by John Burroughs
It sometimes appears combined with fluorine in chlorine trifluoride.
"Uller Uprising" by Henry Beam Piper, John D. Clark and John F. Carr
One of your light cuts letting the fluorine inside will be as deadly as anything I can do.
"Out Around Rigel" by Robert H. Wilson
The preparation of fluorine was finally accomplished by the French chemist Moissan by the electrolysis of hydrofluoric acid.
"An Elementary Study of Chemistry" by William McPherson
Their pseudo-flesh is composed mainly of silicon and fluorine.
"Masters of Space" by Edward Elmer Smith

In news:

Ltd has succeeded in volume production of a fluorine insulating material featuring relative permittivity of 2.4-2.5, which is among the lowest in the industry.
Dow Corning® DWR-7000 Soft Hydro Guard finish offers a soft hand and durable non-fluorine-based water repellency on cellulosic and blended fabrics.
Nonetheless, Mrs Overton said Tuesday that it's the most researched public health issue, stemming back to the Newburgh-Kingston Caries Fluorine Study in 1950.
Compounds for Power Plant Service 14.1 Introduction 14.2 Flue Duct Expansion Joints 14.3 High-fluorine Terpolymers15.

In science:

Because of the negative sign in the ratio of proton-to-neutron spins in fluorine, the LiF/NaF measurements – although seemingly less significant than UKDM in the former exclusion phase space – have been shown to significantly reduce the allowed σn-σp phase space of the UKDM experiment .
Exclusion limits on spin dependent WIMP-nucleon couplings from the SIMPLE experiment
Ethr A of iodine, fluorine and carbon ions in Fig. SA(E) do not depend on A.
A CF3I-based SDD Prototype for Spin-independent Dark Matter Searches
Fluorine and helium recoils are efficiently reconstructed above 150 and 100 keV of recoil energy, respectively.
A Prototype Detector for Directional Measurement of the Cosmogenic Neutron Flux
Fluorine appears more efficient if the detector is being used for neutrons with the energy of tens of MeV’s due to more compact tracks.
A Prototype Detector for Directional Measurement of the Cosmogenic Neutron Flux
This leads us to propose a sputtering mechanism, which relies on direct momentum transfer, as being responsible for the fluorine reduction.
Dose and energy dependence of mechanical properties of focused electron beam induced pillar deposits from Cu(C5HF6O2)2