MAGHEMITE IN SOILS AND ITS ORIGIN I. PROPERTIES AND OBSERVATIONS ON SOIL MAGHEMITES

摘要: A magnetic iron oxide is a common constituent of ferruginous concretions in highly weathered Australian soils and genelally associated with varying proportions hematite occasionally goethite. The X-ray diffraction pattern the low Fe (11) contents (4-15~o total Fe) this phase identify it as maghemite which was further confirmed by IR DTA. This only slightly soluble dithionite but readily 1:1 HC1 or oxalic acid. From mineralogical associations soil concretions, conditions for formation under near pedogenic are suggested.