Cation-exchange capacities and specific surface areas of clay minerals

Cation-exchange capacities and specific surface areas of clay minerals

Table
Cation-exchange capacities and specific surface areas of clay minerals
mineral cation-exchange capacity at pH 7 (milliequivalents per 100 grams) specific surface area (square metre per gram)
kaolinite 3–15 5–40
halloysite (hydrated) 40–50    1,100*
illite 10–40 10–100
chlorite 10–40 10–55
vermiculite 100–150      760*
smectite 80–120 40–800
palygorskite-sepiolite 3–20 40–180
allophane 30–135    2,200*
imogolite 20–30    1,540*
*Upper limit of estimated values.
See as table:

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Universalium. 2010.

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