“…Recently, Cadoux et al (2017) produced Br-bearing silicate glasses with concentrations from 0.5 to 6,000 μ g/g. Attempts to calibrate EPMA standards for Br in basaltic (with ~6,000 ppm Br; Cadoux et al, 2017) and haplogranite glass (with 0.96 ± 0.04 wt% Br, Louvel et al, 2020) have also been recently reported. Zhang et al (2016) synthesized F-bearing glasses in granitic and dioritic rock compositions, which have been used as reference materials for bulk halogen analyses.…”