Why is radium oxide yet to be isolated when a wide range of other radium (II) compounds are known ?

  • 1
    $\begingroup$ I'd guess that not only is it radioactive, but that it is extremely reactive with water to produce the hydroxide salt. So trying to isolate "pure" radium oxide is probably very difficult. $\endgroup$
    – MaxW
    Oct 25 '15 at 8:15
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    $\begingroup$ Anneal radium in an oxygen or oxygen + inert gas atmosphere ? Seems pretty trivial to me. $\endgroup$
    – J. LS
    Oct 26 '15 at 12:25
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    $\begingroup$ BaO is created from BaO2 in over 1175K, this would be even worse in case of RaO, I guess. $\endgroup$
    – Mithoron
    Feb 1 '17 at 17:48
  • $\begingroup$ Not all that wide a range is known for radium compounds. For instance, all the lighter alkaline earth metals have known representatives in the 0 and +1 oxidation states (0 meaning compounds). Radium does not. $\endgroup$ Jun 21 '21 at 12:47

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