Everything about Mullite totally explained
Mullite, or
porcelainite, is a rare
clay mineral with the chemical composition
Al6Si2O13, a form of
aluminium silicate. It is produced artificially during various melting and firing processes, and is used as a
refractory.
In 2006 researchers at
University College London and
Cardiff University discovered that potters in the
Hesse region of Germany since the late
Middle Ages had used mullite in the manufacture of a type of
crucible (known as
Hessian crucibles), that were renowned for enabling alchemists to heat their crucibles to very high temperatures. The formula for making it (using
kaolinitic clay and then firing it at temperatures above 1100 degrees
Celsius) was kept a closely guarded secret.
Mullite is present in the form of acicular crystals in
porcelain.
Further Information
Get more info on 'Mullite'.
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