Interpretation of Analyses of Silicate Glasses and Minerals Obtained by Secondary‐Ion Mass Spectrometry

Abstract
A commercial floa olass was analyzed by secondary‐ion muss spectrometry. The depth profiles show important variations in the 40Ca+, 24Mg+, und 28Si+ ion intensities at the beginning of analyses, even on fresh fracture surfaces. Field‐induced migration of the ions or preferential sputtering cannot account for the observed variations in the secondary‐ion currents.