Feldspar (Potassium Aluminosilicate). HSN: 25291010
The general name for a group of sodium, potassium, calcium, and barium aluminum silicates. Commercially, feldspar usually refers to the potassium feldspars with the formula KAISI, Og, usually with a bit of sodium. Noncombustible.
Grade: Usually based on silicon dioxide content, potassium-sodium ratio, iron content, and grinding fineness.
Occurrence: North Carolina, Colorado, New Hampshire, South Dakota, California, Arizona,
Wyoming, Virginia, Texas. Hazard: Toxic as fine-ground powder.
Use: Pottery, enamel, and ceramic ware; glass; soaps; abrasive; bond for abrasive wheels; ce- ments and concretes; insulating compositions; fertilizer; poultry grit; tarred roofing materials
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