Halloysite

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halloysite

Description

A refractory clay that has a similar composition to kaolin but a different conformation. In halloysite, the plate-like structure are rolled into tubes. This results in high and often, nonuniform, shrinkage of the clay as it dries. Halloysite containing clays are found in New Zealand, Japan, North Africa and Mississippi (Fournier 1996).

Synonyms and Related Terms

haloisite (Port.); Halloysit (Deut.)

Composition Al2O3.3SiO2.2H2O

Hazards and Safety

Noncombustible.

Additional Information

R. Fournier, Illustrated Dictionary of Practical Pottery, Chilton Book Co., Radnor, PA, 1996.

Sources Checked for Data in Record

  • Thomas Gregory, The Condensed Chemical Dictionary, Reinhold Publishing, New York, 3rd ed., 1942
  • Robert Fournier, Illustrated Dictionary of Practical Pottery, Chilton Book Company, Radnor, PA, 1992
  • Random House, Webster's Encyclopedic Unabridged Dictionary of the English Language, Grammercy Book, New York, 1997

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