Chapter 4 Allophane and imogolite

摘要: Publisher Summary Allophane is considered collectively to constitute noncrystalline hydrous aluminosilicates, and imogolite a unique paracrystalline aluminosilicate. These minerals form two of the most common clay constituents soils derived from volcanic ash over wide range climatic conditions. strongly influence physical chemical properties such soils, are often responsible for their low productivity, affect suitability quality as building materials. The presence allophane in parent material other than pumice has also been suggested by various investigators. chapter reviews mineralogical imogolite. A brief mention made allophanes formed deposits rivers hydrothermal alteration, precipitation, or mechanisms, due scarcity data. have large specific surface area high reactivity.