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Smectite

A clay mineral group with high swelling capacity and cation exchange, including montmorillonite.

Related terms

  • Clay

    Soil particles smaller than 0.002 mm in diameter, known for high surface area, water-holding ability, and plasticity. Also used as a soil textural class.

  • Cation exchange

    The process by which cations in soil solution are swapped with those held on negatively charged soil particles like clay and organic matter.