Actinium fluoride can be prepared in solution or by a solid-state reaction. In the first method,
actinium hydroxide is treated with
hydrofluoric acid and the product precipitates:[3]
In the solid-state reaction, actinium metal is treated with
hydrogen fluoride gas at 700 °C in a platinum crucible.[4][5]
Properties
Actinium fluoride is a white solid that reacts with ammonia at 900–1000 °C to yield an actinium oxyfluoride:
While lanthanum oxyfluoride is easily formed by heating
lanthanum fluoride in air, a similar treatment merely melts actinium fluoride and does not yield AcOF.[4][5]
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Haire, Richard G. (2006). "Actinium". In Morss; Edelstein, Norman M.; Fuger, Jean (eds.). The Chemistry of the Actinide and Transactinide Elements (3rd ed.). Dordrecht, The Netherlands:
Springer Science+Business Media. p. 36.
ISBN1-4020-3555-1.
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abFried, Sherman; Hagemann, French; Zachariasen, W. H. (1950). "The Preparation and Identification of Some Pure Actinium Compounds". Journal of the American Chemical Society. 72 (2): 771.
doi:
10.1021/ja01158a034.
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abMeyer, Gerd and Morss, Lester R. (1991) Synthesis of lanthanide and actinide compounds. Springer.
ISBN0-7923-1018-7. pp. 87–88