On the feasibility of NBS 70a K-feldspar as a Rb-Sr age reference sample

Details On the feasibility of NBS 70a K-feldspar as a Rb-Sr age reference sample On the feasibility of NBS 70a K-feldspar as a Rb-Sr age reference sample

Jun 1969

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1969gecoa..33..753c&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 33, Issue 6, pp.753-757

Physics

3

Scientific paper

X-ray fluorescence and isotope dilution analyses establish the NBS 70a K-feldspar as sufficiently homogeneous after regrinding to serve as an interlaboratory Rb-Sr age reference sample. Similar coefficients of variation at approximately 0.2% for a single analysis using 0.1 g samples are obtained for Rb (530 ppm), Sr (65.1 ppm) and radiogenic Sr (3.0 ppm), both between bottles and within bottles.

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