E. A. Jenne 1972 <p>An analysis of the available literature data indicates that the cation exchange capacity and surface charge density of imogolite decrease systematically as the mole % of Al₂O₃ (i.e. 100 Al₂O₃/SIO₂ + Al₂O₃) increases. This behavior is analogous to that of synthetic aluminosilicates. In contrast, no relation is apparent between the cation exchange capacity and mole % Al₂O₃ for allophane. This difference is rather striking and although both are amorphic, i.e. show minimal specific X-ray diffraction effects, imogolite is somewhat more crystalline than allophane (Russell et al., 1969)</p> application/pdf 10.1346/CCMN.1972.0200209 en The Clay Minerals Society Surface charge density dependency on Al2O3 content in imogolite article