Rotten Stone

Description: FELDSPAR

Oxide	Analysis	Formula
K2O	4.30%	0.24
MgO	2.90%	0.38
Na2O	4.30%	0.37
Al2O3	17.70%	0.93
SiO2	60.65%	5.40
Fe2O3	9.04%	0.30
LOI	1.09%	n/a
Oxide Weight		528.93
Formula Weight		534.76

Notes

A soft material resulting from the decomposition of siliceous limestone, or shelly sandstone, whose CaO component has been mostly dissolved by water. Contains V and Ti impurities.

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Typecodes

Feldspar
The most common source of fluxes for high and medium temperature glazes and bodies.

By Tony Hansen
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