Properties Actinium is a soft, silvery-white,Actinium, in Encyclopædia Britannica, 15th edition, 1995, p. 70 radioactive, metallic element. Its estimated shear modulus is similar to that of lead.Seitz, Frederick and Turnbull, David (1964) Solid state physics: advances in research and applications. Academic Press. pp. 289–291 Owing to its strong radioactivity, actinium glows in the dark with a pale blue light, which originates from the surrounding air ionized by the emitted energetic particles. Actinium has similar chemical properties to lanthanum and other lanthanides, and therefore these elements are difficult to separate when extracting from uranium ores. Solvent extraction and ion chromatography are commonly used for the separation.
Properties Actinium is a soft silvery-whiteActinium in Encyclopædia Britannica 15th edition 1995 p 70 radioactive metallic element Its estimated shear modulus is similar to that of leadSeitz Frederick and Turnbull David (1964) Solid state physics advances in research and applications Academic Press pp 289–291 Owing to its strong radioactivity actinium glows in the dark with a pale blue light which originates from the surrounding air ionized by the emitted energetic particles Actinium has similar chemical properties to lanthanum and other lanthanides and therefore these elements are difficult to separate when extracting from uranium ores Solvent extraction and ion chromatography are commonly used for the separation