Abstract
The palygorskite or attapulgite is a mineral clay that has a fibrous morphology with porous crystalline structure, hydrated of type 2:1, which is constituted by layer-shaped strips with two tetrahedral layers connected by a central octahedral layer through the sharing of common oxygens [. It presents in its structure low surface charge, high magnesium content and high specific surface area. This mineral clay together with the sepiolite belong to the class of fibrous clay minerals [.
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