Photograph of a quartz molecular model, courtesy of Indigo® Instruments.
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-3Clip
Melting Point 1740 KClip
Youngs modulus 7.65e10 to 9.72e10 Nm-2Clip
Linear expansivity 0.0000005 K-1Clip
Specific heat capacity 710 Jkg-1K-1Clip
Thermal conductivity 6.2 to 10.7 Wm-1K-1Clip
Dielectric constant 4.5 Clip
Mohs Hardness 7 Clip
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See also: Fused Silica, Silicon Dioxide.

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Subjects: Chemistry

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