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. 2021 Jul 22;13(15):2399. doi: 10.3390/polym13152399

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© 2021 by the author.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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Schematic representation of the structural layers of clays: (a) silicon tetrahedron, (b) magnesium and/or aluminum octahedron. oxygen, silicon, magnesium/aluminum. Adapted from https://www.edafologia.net/, last visited 12 May 2021.

Inline graphic — Schematic representation of the structural layers of clays: (a) silicon tetrahedron, (b) magnesium and/or aluminum octahedron. oxygen, silicon, magnesium/aluminum. Adapted from https://www.edafologia.net/, last visited 12 May 2021.