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Certified Reference MateriaI for Rb-Sr Dating (Potassium FeIdspar)

Code <SUP>87</SUP>Sr<SUP>86</SUP>Sr   Standard values Rb   Mass fraction (10 -6 ) Sr   Mass fraction (10 -6 )
Value Certified Uncertainty Value Certified Uncertainty Value Certified Uncertainty
GBW04411 0.75999 0.00020 249.47 1.04 158.92 0.70
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