Actinium fluoride

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Actinium fluoride
Other names Actinium(III) fluoride
Actinium trifluoride
Identifiers
Standard InChI InChI=1S/Ac.3FH/h;3*1H/q+3;;;/p-3
Standard InChIKey HPPLGHKTZRXLTB-UHFFFAOYSA-K
CAS number [33689-80-4]
Properties[1]
Chemical formula AcF3
Molar mass 284.02 g mol−1 [note 1]
Appearance white solid
Density 7.88 g cm−3
Solubility in water insoluble
Structure[5]
Crystal structure Lanthanum trifluoride
Lattice constant a = 741(1) pm, c = 753(2) pm
Related compounds
Other anions Actinium chloride
Actinium bromide
Actinium iodide
Other cations Scandium fluoride
Yttrium fluoride
Lanthanum fluoride
Other compounds Actinium oxofluoride
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)

Actinium fluoride, AcF3, is the only known binary fluoride of actinium. It has been prepared (on a 10-µg scale) by the reaction of actinium hydroxide with hydrogen fluoride at 700 °C, and will also precipitate out when soluble actinium salts are treated with fluoride ions.[4][5] It reacts with ammonia and water vapour at 900–1000 °C to give the oxofluoride.[4][5]

Notes and references

Notes

  1. The molar mass is based on actinium-227 (t½ = 21.772(3) a; Ar = 227.027 7521(26)),[2] the most commonly encountered isotope of actinium and the one used in the original chemical studies.[3][4]

References

  1. CRC Handbook of Chemistry and Physics, 62nd ed.; Weast, Robert C., Ed.; CRC Press: Boca Raton, FL, 1981; p B-73. ISBN 0-8493-0462-8.
  2. Audi, G.; Bersillon, O.; Blachot, J.; Wapstra, A. H. The NUBASE evaluation of nuclear and decay properties. Nucl. Phys. A 2003, 729, 3–128. doi:10.1016/j.nuclphysa.2003.11.001, <http://amdc.in2p3.fr/nubase/Nubase2003.pdf>.
  3. Hagemann, French The Isolation of Actinium. J. Am. Chem. Soc. 1950, 72 (2), 768–71. DOI: 10.1021/ja01158a033.
  4. 4.0 4.1 4.2 Fried, Sherman; Hagemann, French; Zachariasen, W. H. The Preparation and Identification of Some Pure Actinium Compounds. J. Am. Chem. Soc. 1950, 72 (2), 771–75. DOI: 10.1021/ja01158a034.
  5. 5.0 5.1 5.2 Kirby, H. W.; Morss, L. R. Actinium. In The Chemistry of the Actinide and Transactinide Elements, 3rd ed.; Morss, Lester R.; Edelstein, Norman M.; Fuger, Jean, Eds.; Springer: Dordrecht, the Netherlands, 2006; Vol. 1, Chapter 2, pp 18–51. doi:10.1007/1-4020-3598-5_2, <http://radchem.nevada.edu/classes/rdch710/files/actinium.pdf>.

External links

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