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Oxide Analysis Formula
K2O 4.00% 0.27
Na2O 0.40% 0.04
TiO2 0.40% 0.03
Al2O3 16.00% 1.00
SiO2 72.50% 7.69
Fe2O3 4.00% 0.16
Oxide Weight 620.29
Formula Weight 638.16


A low cost ceramic sericite material useful to reduce firing temperature (it has good bonding properties because of its low PCE), control shrinkage, reduce absorption. Fires to a pink color. The material is prepared by mining and crushing.

Different grades vary primarily by iron content (and fire more pink and then more orange as it increases up to 6%), the analysis shown here is representative.

Related Information


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Materials Andalusite
Materials Pyrophyllite
Materials Alkatrol
Materials Pyrofrac 2023
Materials Pyrofrac 2024
Materials Pyrofrac
Materials Andafrac
Materials Pyrophyl
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Materials Pyrofrac 2034
Materials Pyrofrac 4203
Typecodes Flux Source
Materials that source Na2O, K2O, Li2O, CaO, MgO and other fluxes but are not feldspars or frits. Remember that materials can be flux sources but also perform many other roles. For example, talc is a flux in high temperature glazes, but a matting agent in low temperatures ones. It can also be a flux, a filler and an expansion increaser in bodies.
Minerals Sericite


Pyrometric Cone Equivalent14
Density (Specific Gravity)2.6

By Tony Hansen

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