Quartz

lenses, windows, mirrors, filters and prisms

Transmission Range 0.15 – 4.5 microns
Crystal Structure Rock Salt
Cleavage Plane 100
Colour colourless
Density 2.648 at 25 °C
Melting Point (°) 1470
Reflection Loss 8.2% (2µ) for 2 surfaces
Solubility index insoluble
Hardness (Knoop) 741.0
Thermal Conductivity (cal/cm sec°C) 0.0255
Thermal Expansion coefficient (/°C) 7.97 x 10-6 (parallel to C axis)
13.37 x 10-6 (vertical to C axis)