Basic Introduction: Feldspar is a group of rock-forming tectosilicate minerals that make up over half of the Earth’s crust by weight. The most common varieties are potassium feldspar (KAlSi3​O8​), sodium feldspar (NaAlSi3​O8​), and calcium feldspar (CaAl2​Si2​O8​). They are a key component of igneous, metamorphic, and sedimentary rocks.

Chemical Formula: Variable; examples include

KAlSi3​O8​(Orthoclase),NaAlSi3​O8​(Albite), andCaAl2​Si2​O8​(Anorthite).

CAS NO.: 68476-25-5

8-digit HS Code: 25291000

Industries Used In:

• Glass and Ceramics: The primary use is as a fluxing agent to lower the melting temperature of glass and as a raw material for ceramic bodies and glazes.
• Fillers and Extenders: Used as a functional filler in paints, plastics, and rubber.
• Construction: Used in some types of tiles and as a component of decorative stone.

Application or Usage: A crucial raw material in the glass and ceramics industry, providing a source of alumina and lowering melting points.