Alkali metals are found in the first column of the periodic table (abbreviation: R2O).  Lithium (Li2O), Sodium (Na2O) and Potassium (K2O).  These are the primary fluxes for our glazes.

We generally source our alkali metals from naturally occurring feldspars and feldspathoids.

The generic formula for a feldspar is R2O‑Al2O3‑6SiO2. Feldspathoids are similar but their compositions are different ratios of Alkali Metal, Alumina and Silica molecules.

Custer and G200 are brands of Potassium feldspar. The generic formula for a Potassium feldspar is K2O-Al2O3-6SiO2

Minspar and Kona F-4 are brands of Sodium feldspar.  The generic formula for a Sodium feldspar is Na2O-Al2O3-6SiO2

Nepheline Syenite is a brand of feldspathoid.  The generic formula for Nepheline Syenite is 3Na2O-K2O-4Al2O3-9SiO2

Spodumene  and Petalite are feldspathoids and sources of Lithium.  The generic formula for Spodumene is Li2OAl2O3‑4SiO2. The generic formula for Petalite is Li2OAl2O3‑8SiO2

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