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Custer Feldspar

Price:
$35.00
SKU:
RM-C006
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Product Description

NaKO.Al2O3.6SiO2

Crystalline minerals made up of mainly silica and alumina in combination with sodium and potassium oxides. Often considered a natural frit. Used extensively in both clay, up to 25% and glaze, up to 100%.

CUSTER - A potash spar used extensively in clay and glaze formulas.

Typical analysis:
SiO2 72.92%
Al2O3 14.95%
Na2O 4.13%
K2O 3.83%
CaO 2.10%
CaF2 1.10%
Fe2O3 0.03%
 
LOI 0.86%


Melting Point 1100°C to 1300°C

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