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1.Crystalline silicate clays (e.g. kaolinte, mica, smectites, vermiculites)
2.Non-crystalline silicate clays (e.g. Allophane)
3.Iron and Aluminum oxide clays (e.g. Oxides)
4.Organic Colloids e.g. humus.
jim items answered the question on October 19, 2018 at 09:52
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