Feldspar By Silicon Products (P) Associates

Feldspar are one of the most abundant-rock forming minerals in the earth's crust, comprising a complex of varieties. The term Feldspar designates a group of minerals that have a general similarity in physical and chemical properties. The Feldspars are indeed so much alike in appearance and general properties that they cannot be told apart megascopically except in specially Favourable circumstances.

# CHEMICAL COMPOSITION NAISi3 O8 (N For Na, k, Ca & Ba)
# PHYSICAL CHARACTERS Specific Gravity:
# -Potassic Feldspar 2.5-2.6 -Plagioclase Feldspar 2.6-2.8 Hardness:
-Potassic Feldspar 6-6 1/2 -Plagioclase Feldspar 6-6 1/2

# TYPES Pure Feldspar
# -Orthoclase: KAI Si3O8 silicate of potassium and aluminium, Flash red, Brick red. -Albite: Na AiSi3 O8 Silicate of sodium and aluminium, White Gray, Colourless. -Anorthite: Ca AI2 Si3 O8 silicate ofcalcium & aluminum, White Gray, Colourless. Solid Solutions
-Alkali feldspars: (KNa)ALSi3O8 solid solution of orthoclase and albite -Plagioclase Feldspars: NaALSi3O8 X (Ca AL2 Si2 O8). Solid solution of albite & anorthite. USES -Ceramic flux: Ceramic binder for abrasive wheels. -Coease Powder: Glass manufacture, Source of potassium salts. -Mild abrasive: Sand paper for wood working, Glass polishing. -Other uses: Acid resistant, catalyst, decorative stone.