Electron Probe Technique for Measuring the Iron Oxidation State of Silicate Glasses Hughes, Ery C. ; Buse, Ben ; Kearns, Stuart L. ; Blundy, Jon D. Abstract Publication: Microscopy and Microanalysis Pub Date: August 2018 DOI: 10.1017/S1431927618010826 Bibcode: 2018MiMic..24S2068H