STATE ANALYSIS OF IRON IN ALLOPHANIC CLAYS. II. IRON L-EMISSION BAND SPECTRA FROM ALLOPHANIC CLAYS AND HISINGERITE BY THE USE OF AN X-RAY MICROANALYZER

Abstract

The state of iron in allophanic clays was compared with that of iron in hydrous iron silicate hisingerite on the basis of their Fe L-emission band spectra. The result suggested that the form of iron in allophanic clays might differ from that of iron in hisingerite samples, which had been reported as being very poorly-crystallized variants of nontronite and of iron saponite.