Rubidium Isotope Materials
In both terrestrial materials and chondrites, δ87Rb 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.
|NIST SRM 984||RbCl||0 ‰*|
|IRMM-619||RbNO3 solution||0(1) ‰|
* Exact value defining the δ87RbSRM984 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.