| Chemistry name: | potassium aluminum silicate |
| M Formula: | (4K2O•Al2O3•3SiO2) |
| Properties: | |
| High impact strength, impermeable to liquids and gases, resistant to chemicals except hydrogen fluoride and hot, strong caustic solutions, usable up to 1093C but subject to heat shock. D 2.41, Mohs hardness 6–7, compression strength 100,000 psi. | |
| Grade: | |
| Chemical and electrical. | |
| Use: | |
| Reaction vessels, spark plugs, electrical resistors, electron tubes, corrosion-resistant equipment, ball mills and grinders, food-processing equipment, piping, valves, pumps, tower packing, laboratory ware. | |