Fig. 2
From: Towards a unifying mechanistic model for silicate glass corrosion

NanoSIMS profiles across the SAL into the pristine glass of ISG-90/90 and QBG-90/150 samples. Colored symbols represent normalized isotope counts (or sums of them), black symbols and right ordinates represent isotope ratios. Origin of abscissa is set to the inflection point of the sigmoidal-shaped oxygen isotope ratio at the SAL-glass interface. Symbol size matches the estimated NanoSIMS probe diameter. Gray area represents the location and thickness of a dense layer observed in STEM (Fig. 3)