Abstract
ATOMIC WEIGHTS OF CAESIUM AND RUBIDIUM.—M. Godeffroy gives an account in Liebig's Annalen of some determinations he has made on the above subject. To obtain pure material he employs Redtenbacher's method for the separation of the caesium, rubidium, and potassium, by preparing their respective alums, separating these by fractional crystallisation, and finally converting them into pure chlorides of the metals. The determination of chlorine in the non-diliquescent caesium chloride, gave, as the mean of four closely-agreeing experiments, the atomic weight of caesium as equal to 132·557, the atomic weights of chlorine and silver being taken as 35·46 and 107·94 respectively; from analogous experiments the author finds the atomic weight of rubidium to be equal to 85·476.
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Chemical Notes . Nature 15, 282–283 (1877). https://doi.org/10.1038/015282a0
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DOI: https://doi.org/10.1038/015282a0