Fig. 3
From: Sample size and the limits to precision in Pb-isotopic dating by ID-TIMS
Distribution of radiogenic 206Pb between leaching steps in whole rock and mineral fractions of ungrouped achondrite Northwest Africa 6704 (Amelin et al. 2019). Green bars—pyroxene, blue bars—plagioclase. Leaching steps: W1—0.5 M HNO3 at ambient temperature with ultrasonication, W2—combined hot 7 M HNO3 and hot 6 M HCl, R—dissolution in hot concentrated HF + HNO3