2005/12/01 by E. Joussein, Emmanuel Joussein, Sabine Petit +8 · 3 citations
Engineering · Health Professions · Materials Science · #Clay minerals and soil interactions #Soil and Unsaturated Flow #Therapeutic Uses of Natural Elements
paper · doi:10.1180/0009855054040180
crossref issued 2005/12/01 · crossref published 2005/12/01 · crossref published-print 2005/12/01 · openalex publication_date 2005/12/01 · crossref created 2006/02/04 · crossref published-online 2018/07/09 · crossref deposited 2025/01/07 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/31 · crossref indexed 2026/07/31
Abstract Halloysite clay minerals are ubiquitous in soils and weathered rocks where they occur in a variety of particle shapes and hydration states. Diversity also characterizes their chemical composition, cation exchange capacity and potassium selectivity. This review summarizes the extensive but scattered literature on halloysite, from its natural occurrence, through its crystal structure, chemical and morphological diversity, to its reactivity toward organic compounds, ions and salts, involving the various methods of differentiating halloysite from kaolinite. No unique test seems to be ideal to distinguish these 1:1 clay minerals, especially in soils. The occurrence of 2:1 phyllosilicate contaminants appears, so far, to provide the best explanation for the high charge and potassium selectivity of halloysite. Yet, hydration properties of the mineral probably play a major role in ion sorption. Clear trends seem to relate particle morphology and structural Fe. However, future work is required to understand the possible mechanisms linking chemical, morphological, hydration and charge properties of halloysite.