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Curium(III) fluoride

Crystal structure
IUPAC name
Curium(III) fluoride
Other names
Curium trifluoride
3D model (JSmol)
  • InChI=1S/Cm.3FH/h;3*1H/q+3;;;/p-3 checkY
  • F[Cm](F)F
Appearance Colorless solid[1]
Melting point 1406 ± 20 °C;[1]
~10 mg/L
Rhombohedral, hR24
P3c1, No. 165[2]
a = 0.7012 nm, c = 0.7198 nm
121 J/mol·K[1]
−1660 kJ/mol[1]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Curium(III) fluoride or curium trifluoride is the chemical compound composed of curium and fluorine with the formula CmF3.[3] It is a white, nearly insoluble salt that has the same crystal structure as LaF3. It precipitates as a hydrate when fluoride ions are added to a weakly acidic Cm(III) solution; alternatively it can be synthesized by reacting hydrofluoric acid with Cm(OH)3. The anhydrous form is then obtained by desiccation or by treatment with hydrogen fluoride gas.[1]


  1. ^ a b c d e Haire, Richard G. (2006). "Curium (9.7.3 Halides)". 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. 1417. doi:10.1007/1-4020-3598-5_9. ISBN 1-4020-3555-1.
  2. ^ Nave, S. E.; Haire, R. G.; Huray, Paul G. (1983). "Magnetic properties of actinide elements having the 5f6 and 5f7 electronic configurations". Physical Review B. 28 (5): 2317. doi:10.1103/PhysRevB.28.2317.
  3. ^ Macintyre, Jane E. (23 July 1992). Dictionary of Inorganic Compounds. CRC Press. p. 3046. ISBN 978-0-412-30120-9. Retrieved 27 June 2023.