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  • Elements

    [ 227 ]

    Compounds of actinium:

    actinium (III) iodide

    • Formula as commonly written: AcI3
    • Hill system formula: Ac1I3
    • CAS registry number: [33689-82-6]
    • Formula weight: 607.741
    • Class: iodide


    • actinium (III) iodide
    • actinium iodide
    • actinium triiodide

    Physical properties

    • Colour: white
    • Appearance: crystalline solid
    • Melting point:
    • Boiling point:
    • Density:

    Element analysis and oxidation numbers

    For each compound, and where possible, a formal oxidation number for each element is given, but the usefulness of this number is limited, especially so for p-block elements in particular. Based upon that oxidation number, an electronic configuration is also given but note that for more exotic compounds you should view this as a guide only.
    Element%Formal oxidation stateFormal electronic configuration
    Ac 37.363[Rn]
    I 62.64-1[Kr].4d10.5s2.5p6


    Ac2O3 + 2Al + 3I2 2AcI3 + Al2O3

    Isotope pattern

    What follows is the calculated isotope pattern for the AcI3 unit with the most intense ion set to 100%.

    Formula: Ac1I3

    mass %608 100.0 __________________________________________________


    Coming soon....


    The data on these compounds pages are assembled and adapted from the primary literature and several other sources including the following.

    • R.T. Sanderson in Chemical Periodicity, Reinhold, New York, USA, 1960.
    • N.N. Greenwood and A. Earnshaw in Chemistry of the Elements, 2nd edition, Butterworth, UK, 1997.
    • F.A. Cotton, G. Wilkinson, C.A. Murillo, and M. Bochmann, in Advanced Inorganic Chemistry, John Wiley & Sons, 1999.
    • A.F. Trotman-Dickenson, (ed.) in Comprehensive Inorganic Chemistry, Pergamon, Oxford, UK, 1973.
    • R.W.G. Wyckoff, in Crystal Structures, volume 1, Interscience, John Wiley & Sons, 1963.
    • A.R.West in Basic solid state chemistry Chemistry, John Wiley & Sons, 1999.
    • A.F. Wells in Structural inorganic chemistry, 4th edition, Oxford, UK, 1975.
    • J.D.H. Donnay, (ed.) in Crystal data determinative tables, ACA monograph number 5, American Crystallographic Association, USA, 1963.
    • D.R. Lide, (ed.) in Chemical Rubber Company handbook of chemistry and physics, CRC Press, Boca Raton, Florida, USA, 77th edition, 1996.
    • J.W. Mellor in A comprehensive treatise on inorganic and theoretical chemistry, volumes 1-16, Longmans, London, UK, 1922-1937.
    • J.E. Macintyre (ed.) in Dictionary of inorganic compounds, volumes 1-3, Chapman & Hall, London, UK, 1992.
  • AcF3
  • Chlorides
  • AcCl3
  • Bromides
  • AcBr3
  • Iodides
  • AcI3
  • Hydrides
  • AcH2
  • Oxides
  • Ac2O3
  • Sulfides
  • Ac2S3
  • Selenides
    none listed
    none listed
    none listed

    Our data and resources are taken from Web Elements