Found naturally as faceted crystals. Its birefringent properties are used in the production of optical quarter-wave plates and polarizers. A mineral whose primary component is silicon dioxide (SiO2
). Its colour and other aspects of its appearance depended on the impurities present.
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| Density|| 2649|| kgm-3||Clip|
| Melting Point || 1740|| K||Clip|
| Youngs modulus|| 7.65e10 to 9.72e10|| Nm-2||Clip|
| Linear expansivity|| 0.0000005|| K-1||Clip|
| Specific heat capacity|| 710|| Jkg-1K-1||Clip|
| Thermal conductivity || 6.2 to 10.7|| Wm-1K-1||Clip|
| Dielectric constant|| 4.5|| ||Clip|
| Mohs Hardness|| 7|| ||Clip|
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See also: Fused Silica, Silicon Dioxide.
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