gsminmag Mineralogical Magazine Mineralogical Magazine 0026-461X Mineralogical Society 10.1180/minmag.1956.031.233.05 A First Attempt at a Determination of Felspars by Activation Analysis Bradley J. E. S. B.Sc., Ph.D. Bradley Olive B.Sc., Ph.D., F.G.S. King's College, London, W.C. 2 6 1956 31 233 164 172 Copyright © 1956, The Mineralogical Society 1956 Summary

Small crystals (2 mg.) of plagioclase and potassium felspar were irradiated for four weeks in an atomic pile. Subsequent analysis of the radiation showed that this is a possible method for the determination of the sodium and potassium content, and it should be possible to develop the method further in this direction. It has not proved a suitable method for the determination of calcium.