Data for: Instrumental mass fractionation during sulfur isotope analysis by secondary ion mass spectrometry in natural and synthetic glasses

Supplementary spreadsheets containing the sulfur isotope data collected from glasses by SIMS (spreadsheet1), a comparison between sulfur contents of the glasses measured by SIMS and EPMA (spreadsheet2), and the starting composition of the experimental glasses used in the study (spreadsheet3). Tables presented in the manuscript are also provided as an excel spreadsheet for easy access.