Peak deconvolution of the corrected spectra using pseudo-Voigt peak shape functions (not illustrated) minimizes to a Gaussian peak-shape for HERFD-XAS and a Lorentzian peak-shape for conventional XAS, with respective full-widths at half height of 2.2 eV and 4.4 eV. This is very similar to results for other elements and consistent with the predominant sources of line broadening being instrumental (Gaussian) for HERFD-XAS and due to lifetime effects (Lorentzian) for conventional XAS. Particle size is also important; using methods previously described we predict that for spherical particles of As2S3 diameters of 100 µm show significant fluorescence self-absorption distortion while 10 µm particles show minimal distortion, illustrating the importance of sample preparation.