Calcite – CaCO3
lenses, windows, mirrors, filters and prisms
Calcite is a negative uniaxial crystal with high birefringence. It is usually mined and cuts and polishes well. It is a negative uniaxial crystals and is usually used for visible and near IR polarizers. Calcite offers a wide range of spectral transmission making it prefect for precision optics. Calcite is perfect for manufacture of polarizers used in visible-IR range. These include Glan-Taylor polarizers, Glan-Thompson polarizers and Glan laser polarizers. Calcite plates/blocks are now routinely used for time delay compensation between two orthogonally polarized ultrafast pulses.
|Transmission Range||0.3 – 5.5 µ|
|Crystal Structure||Sodium Nitrate|
|Melting Point (°)||1339 (under 102.5 atmosphere pressure) Decomposes at 894.4°C|
|Reflection Loss||10.6% (2µ) for 2 surfaces|
|Solubility index||1.0×10-3/100gm / 8.7°C|
|Hardness (Knoop)||3.0 (Moh)|
|Thermal Conductivity (cal/cm sec°C)||1.32×10-2 (Parallel to C axis)
1.11×10-2 (Vertical to C axis)
|Thermal Expansion coefficient (/°C)||25×10-6 (Parallel to C axis)
-5.8×10-6 (Vertical to C axis)
Whilst every effort has been made to verify the data provided, no responsibility can be accepted for its accuracy
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Whilst every effort has been made to verify all data provided, no responsibility can be accepted for its accuracy.