gsminmag Mineralogical Magazine Mineralogical Magazine 0026-461X Mineralogical Society 10.1180/minmag.1965.035.269.13 The Identification, Mode of Occurrence, and Quantitative Determination of Crystalline Phases in Granulated Blast-Furnace Slag Steyn J. G. D. D.Sc. Research and Process Development Laboratories, South African Iron and Steel Industrial Corporation 3 1965 35 269 108 117 23 4 1964 Copyright © 1965, The Mineralogical Society 1965 Summary

This paper describes a technique for the identification and quantitative determination of crystalline phases in granulated blast-furnace slag by means of incident light microscopy on polished and etched samples. The crystalline phases (including periclase) observed in high-magnesia granulates are reported and their mode of occurrence illustrated.