Thorium(IV) fluoride
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Identifiers | |
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3D model (JSmol)
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ECHA InfoCard | 100.033.857 |
EC Number |
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PubChem CID
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CompTox Dashboard (EPA)
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Properties | |
ThF4 | |
Molar mass | 308.03 g/mol |
Appearance | white crystals |
Density | 6.3 g/cm3 |
Melting point | 1,110 °C (2,030 °F; 1,380 K) |
Boiling point | 1,680 °C (3,060 °F; 1,950 K) |
Refractive index (nD)
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1.56 |
Structure | |
Monoclinic, mS60 | |
C12/c1, No. 15 | |
Hazards | |
Flash point | Non-flammable |
Related compounds | |
Other anions
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Thorium(IV) chloride Thorium(IV) bromide Thorium(IV) iodide |
Other cations
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Protactinium(IV) fluoride Uranium(IV) fluoride Neptunium(IV) fluoride Plutonium(IV) fluoride |
Related compounds
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Thorium dioxide |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Thorium(IV) fluoride (ThF4) is an inorganic chemical compound. It is a white hygroscopic powder which can be produced by reacting thorium with fluorine gas. At temperatures above 500 °C, it reacts with atmospheric moisture to produce ThOF2.[1]
Uses
[edit]Despite its (mild) radioactivity, thorium fluoride is used as an antireflection material in multilayered optical coatings. It has excellent optical transparency in the range 0.35–12
Thorium fluoride was used[when?] in making carbon arc lamps, which provided high-intensity illumination for movie projectors and search lights.[4][5]
See also
[edit]References
[edit]- ^ Dale L. Perry, Sidney L. Phillips (1995). Handbook of inorganic compounds. CRC Press. p. 412. ISBN 0-8493-8671-3.
- ^ James D. Rancourt (1996). Optical thin films: user handbook. SPIE Press. p. 196. ISBN 0-8194-2285-1.
- ^ W. Heitmann and E. Ritter (1968). "Production and properties of vacuum evaporated films of thorium fluoride". Appl. Opt. 7 (2): 307–9. Bibcode:1968ApOpt...7..307H. doi:10.1364/AO.7.000307. PMID 20062461.
- ^ McKetta, John J. (1996). Encyclopedia of Chemical Processing and Design: Thermoplastics to Trays, Separation, Useful Capacity. CRC Press. p. 81. ISBN 0-8247-2609-X.
- ^ Thorium tetrafluoride Archived 2013-02-16 at archive.today International Bio-Analytical Industries, Inc.