Borosilicate

Physical properties

CompositionSiO2 81% B2O3 13% Na2O + K2O 4% Al2O3 2%
density2.23 g/cm3
Max working temperature200 to 300°C
Hardness6 mohs
Refraction index1.473 nm (586.3nm)
Size0.50 to 20.00 mm
saphir - SandozNon contractual illustration