00952naa a2200181 a 450000100080000000500110000800800410001910000170006024500410007726000090011852004940012765000090062165000120063065000090064265300230065170000220067477300740069620938332018-08-03       1980    bl uuuu     u00u1 u    #d1 aKITAGAWA, Y.  aKaolin minerals in the Amazon soils.  c1980  aThe kaolin mineraIs in the Amazon upland soils vary ranging from the well-crystallized triclinicfb-axis disordered kaolinite intermediate in a red yellow latosol and a red yellow podzolic soil to the disordered kaolinitefhalloysite (7 Á) intermediate in a "Terra Roxa Estruturada" soil and a reddish brunizem. The particle size of kaolin mineraIs become smaller, and their structural randomness increase, with the increase of iron content of the clay fractions in the Amazon upland soils.  asoil  aMineral  aSolo  aGeological deposit1 aMÖLLER, M. R. F.  tSoil Science and Plant Nutritiongv. 26, n. 2, p. 255-269, June 1980.