Custer Feldspar (post-2000)

Oxide	Analysis	Formula
SiO2	72.40%	8.63
Al2O3	15.27%	1.07
Fe2O3	0.21%	0.01
K2O	7.52%	0.57
Na2O	3.21%	0.37
CaO	0.27%	0.03
MgO	0.07%	0.01
P2O5	0.20%	0.01
LOI	0.65%	n/a
Oxide Weight		710.43
Formula Weight		715.08

Notes

This is an average of actual assays done. See the notes for Custer Feldspar (pre-2000) for more info.

Related Information

Links

Materials	Custer Feldspar (pre-2000) The most common potash feldspar used in ceramics in North America. It was a standard for many decades but is no longer available.
URLs	https://www.ronroy.net/analyses/custer-article-.pdf Ron Roy article about changes in Custer Feldspar

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