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Cristobalite Toxicity

Tridymite and cristobalite phases of silica. Ordinary kiln wash made from a mixture of kaolin and quartz can produce significant amounts of very fine grained cristobalite. This poses a greater health risk than ordinary quartz.

By Tony Hansen
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Glossary Cristobalite Inversion
In ceramics, cristobalite is a form (polymorph) of silica. During firing quartz particles in porcelain can convert to cristobalite. This has implications on the thermal expansion of the fired matrix.

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