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Oxide Analysis Formula
Na2O 0.40% 0.02
TiO2 0.40% 0.02
Al2O3 32.00% 1.00
SiO2 63.50% 3.37
Fe2O3 0.70% 0.01
Oxide Weight 309.19
Formula Weight 318.75


The Andafrac group of mineral products consists of high highly beneficiated Andalusite/Pyrophyllite ores of the best grade available. These products range from coarse grain down to pulverized powders. Volume stability, low hot load deformation and low thermal expansion are characteristic of the high beneficiated ores. The many applications for these products include plastics, castables, kiln car refractories and furnace slag parting compounds.

Three versions are available and they have the same chemistry.
4201 is the coarsest with 53% on 8 mesh.
2001 is dry milled and magnetically separated and is the finest with 4% on 200 mesh. It has a much lower bulk density.
0071 has 65% on 20 mesh.

Related Information


Materials Andalusite
Materials Seriphyl
Materials Pyrophyl
Materials Pyrofrac
Materials Pyrotrol
Materials Alkatrol
Minerals Andalusite
Minerals Pyrophyllite
Typecodes Aluminum Silicate
Materials not classifiable as commonly known aluminum silicates. For example, kaolin is a common aluminum silicate.


Bulk Density lbs/cu. ft. (Packed)83-112
Frit Softening Point31 PCE
Density (Specific Gravity)2.87

By Tony Hansen

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