Feldspar

Name:
Feldspar
Detailed information:

Chemistry name:	potassium aluminosilicate
M Formula:	KAlSi3O8
Occurrence:
North Carolina, Colorado, New Hampshire, South Dakota, California, Arizona, Wyoming, Virginia, Texas.
Grade:
Usually based on silicon dioxide content, potassium-sodium ratio, iron content, and fineness of grinding.
Hazard:
Toxic as fine-ground powder.
Use:
Pottery, enamel, and ceramic ware; glass; soaps; abrasive; bond for abrasive wheels; cements and concretes; insulating compositions; fertilizer; poultry grit; tarred roofing materials.