Fig. 2: Ni concentration and isotope measurements of the solid and solution products from the transformation reflux procedure.

δ60Ni of the solid and solution products from time aliquots of the transformation reflux procedure (A) and the Δ60Niaqueous-min as a function of time (B). Concentration of Ni and Mn in the reflux solution as a function of reflux time (C) and the absolute Ni wt% of the solid as a function of reflux time (D). Error bars on δ60Ni values are the long-term reproducibility of the isotope ratio analyses at ±0.08‰ and are within the size of the symbols. Error bars on Mn and Ni concentrations were less than ±1.32% and are within the size of the symbols.