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Using a Field Spectrometer to Distinguish Kaolinite from Halloysite

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Using a Field Spectrometer to Distinguish Kaolinite from Halloysite

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Kaolinite and halloysite are both dioctahedral 1:1 layer silicates and hydrated aluminum silicates. They are similar in genesis, structure and composition. Kaolinites and halloysites have the same chemical composition except that halloysite has a higher water content. Kaolinites have a platy sheet structure while halloysites can display tubular, spheroidal or platy morphologies.

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