Lithium fluoride

Lithium fluoride

Chembox new
Name = Lithium fluoride
ImageFile1 = LiF-crystal.jPeG
ImageSize1 = 120px
ImageName1 = Lithium fluoride boule
ImageFile2 = Lithium-fluoride-3D-ionic.png ImageSize2 = 120px
ImageName2 = Lithium fluoride
IUPACName = Lithium fluoride
Section1 = Chembox Identifiers
CASNo = 7789-24-4
PubChem = 224478
EINECS = 232-152-0
Section2 = Chembox Properties
Formula = LiF
MolarMass = 25.939(2) g/mol
Appearance = white solid
Density = 2.64 gcm-3
Solvent = water
SolubleOther = 2.7 g/l at 20°C
MeltingPt = 848 °C (1121 K)
BoilingPt = 1671 °C (1944 K)
Section3 = Chembox Structure
MolShape = Linear
CrystalStruct = Cubic
Section4 = Chembox Hazards
EUClass = Toxic
NFPA-H = 1
NFPA-R = 0
NFPA-F = 0
RPhrases = R25, R32, R36, R37, R38
SPhrases = S22, S26, S36, S37, S39, S45
Section5 = Chembox Related
OtherAnions = Lithium chloride

Lithium bromide

Lithium iodide
OtherCations = Sodium fluoride

Potassium fluoride

Rubidium fluoride

Caesium fluoride

Lithium fluoride is a chemical compound of lithium and fluorine. It is a white, inorganic, crystalline, ionic, solid salt under standard conditions. It transmits ultraviolet radiation more efficiently than any other substance. Uses include specialized UV optics,cite web | title= Crystran Ltd., a manufacturer of infrared and ultraviolet optics| url=http://www.crystran.co.uk/index.htm | accessdate = 2005-09-15] and as a means to record gamma and neutron exposure in thermoluminescent dosimeters. Lithium fluoride also has a very high electrical resistance due to its wide band gap. Griceite is the name for very rare mineralogical form of LiF.

Lithium fluoride (highly enriched in the common isotope lithium-7) forms the basic constituent of the preferred fluoride salt mixture used in liquid-fluoride nuclear reactors. Typically lithium fluoride is mixed with beryllium fluoride to form a base solvent, into which fluorides of uranium and thorium are introduced. Lithium fluoride is exceptionally chemically stable and LiF/BeF2 mixtures have low melting points and the best neutronic properties of fluoride salt combinations appropriate for reactor use.

References

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  • lithium fluoride — Chem. a fine, white, slightly water soluble powder, LiF, used chiefly in the manufacture of ceramics. [1940 45] * * * lithium fluoride, a white powder used in ceramics, as a flux in soldering and welding, and, in the form of synthetic crystals,… …   Useful english dictionary

  • lithium fluoride — noun a salt that may be prepared by the action of hydrofluoric acid on many lithium compounds, and occurs naturally as griceite; its crystals are used in optical instruments, and in radiation dosimetry (based on its radiothermoluminescence) …   Wiktionary

  • lithium fluoride — noun Date: 1944 a crystalline salt LiF used especially in making prisms and ceramics and as a flux …   New Collegiate Dictionary

  • lithium fluoride — Chem. a fine, white, slightly water soluble powder, LiF, used chiefly in the manufacture of ceramics. [1940 45] * * * …   Universalium

  • Yttrium lithium fluoride — (LiYF4, sometimes abbreviated YLF) is a birefringent crystal, typically doped with neodymium and used as a gain medium in solid state lasers. See also *Neodymium doped yttrium lithium fluoride …   Wikipedia

  • Neodymium-doped yttrium lithium fluoride — (Nd:YLF) is a lasing medium for arclamp pumped and diode pumped solid state lasers. The YLF crystal (LiYF4) is naturally birefringent, and commonly used laser transitions occur at 1047 nm and 1053 nm. It is used in Q switched systems in part due… …   Wikipedia

  • Lithium — (pronEng|ˈlɪθiəm) is a chemical element with the symbol Li and atomic number 3. It is a soft alkali metal with a silver white color. Under standard conditions, it is the lightest metal and the least dense solid element. Like all alkali metals,… …   Wikipedia

  • lithium — /lith ee euhm/, n. 1. Chem. a soft, silver white metallic element, the lightest of all metals, occurring combined in certain minerals. Symbol: Li; at. wt.: 6.939; at. no.: 3; sp. gr.: 0.53 at 20°C. 2. Pharm. the substance in its carbonate or… …   Universalium

  • Lithium chloride — Chembox new Name = Lithium chloride ImageFile1 = Lithium chloride.jpg ImageSize1 = 150px ImageName1 = Lithium chloride ImageFile2 = Lithium chloride 3D ionic.png ImageSize2 = 150px ImageName2 = Lithium chloride IUPACName = Lithium Chloride… …   Wikipedia

  • Lithium iodide — Chembox new Name = Lithium Iodide ImageFile = Lithium iodide 3D ionic.png ImageName = Lithium iodide OtherNames = lithium(I) iodide Section1 = Chembox Identifiers CASNo = 10377 51 2 Section2 = Chembox Properties Formula = LiI MolarMass = 133.845… …   Wikipedia

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