References
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- TONSIL, at present Actisil FF, is a commercial Mexican Bentonitic clay available from Tonsil Mexicana S.A. Examined with X-ray flourescence, this clay proved to have the following composition %: SiO2, 74.5; Al2O3, 9.3; MgO, 0.4; Fe2O3, 1.3; CaO, 0.4; TiO2, 0.4; H2O, 9.5 (110 °C). The clay showed a specific surface area of 55.3 m2/g; the interlayer distance was proved to be 15 Å, using parafine as the internal standar reference. It is worth mentioning that quartz and cristobalite are also important components.
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