Desertalc

Description: Originally from Johns-Manville

Oxide	Analysis	Formula
SiO2	59.20%	1.37
MgO	23.50%	0.81
Al2O3	0.81%	0.01
Fe2O3	0.25%	-
CaO	5.80%	0.14
Na2O	1.23%	0.03
K2O	1.21%	0.02
TiO2	0.04%	-
LOI	7.96%	n/a
Oxide Weight		127.98
Formula Weight		139.04

Notes

From our information, this is the forerunner of Pioneer talc.
The chemistry is a little different, but that could be attributed to variation in the material, different blending, mining location, etc.

Related Information

Links

Materials	Talc A source of MgO for ceramic glazes, a flux or thermal expansion additive in clay bodies, also used in the manufacture of cordierite.
Materials	Pioneer 2661 Talc
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.
Hazards	Talc Hazards Overview Talc is invaluable in the ceramics industry, it is used as a glaze and body ingredient and as a parting a release agent in various processes. Is it safe?

By Tony Hansen
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