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    Rubidium Isotope Materials

    In both terrestrial materials and chondrites, δ(87Rb) values usually do not vary by more than 1–2 ‰, indicating a very homogeneous mixture of rubidium isotopes throughout the solar system. Owing to this isotopic invariability, changes in the rubidium isotope ratio have only rarely been studied.

    δ(87Rb) Values of Reference Materials

    Name Material δSRM984(87Rb)
    NIST SRM 984RbCl 0 ‰*
    IRMM-619RbNO3 solution 0(1) ‰
    Name Material δSRM984(87Rb)

    Footnotes      Back to Top
    * Exact value defining the δ(87Rb) SRM984 scale.
    Values in parenthesis are expanded (k = 2) uncertainties applicable to the last digits. The values listed in this table are compilation and are not necessarily CIAAW recommendations.


    W.A. Brand et al
    Assessment of international reference materials for isotope-ratio analysis Pure and Applied Chemistry 86, 425-467 (2014)