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Crystals
Quartz SiO2
Berlinite AlPO4
Gallium orthophosphate GaPO4
Turmaline
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Barium titanate BaTiO3
Lead zirconate titanate PZT

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Zinc oxide ZnO
Aluminum nitride AlN
Polyvinylidene fluoride PVDF
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Quartz SiO2

Introduction

The trigonal crystallized silica of SiO2 is known as Quartz and is one of the most common crystals on earth's surface. It has an hexagonal structure made of , piezo quartz

Properties

Quartz is a very pure crystal and contains only traces of other elements. Natural quartz contain:

  • Al3+: 13 to 15,000 ppm, usually only 100 ppm
  • Fe3+:
  • Ti4+:
  • P5+:
  • H+:
  • Li+:
  • Na+: 9 to 1400 ppm
  • K+: 3 to 300 ppm

    Density: 2.65 g/cm3

    Mineral class: Oxides/hydroxides

    Piezoelectricity

    Quartz shows a strong piezoelectric effect perpendicularly to the prism axis. Applying pressure on a quartz crystal generates an electrical polarization along the pressure direction. Alternatively, applying an electrical tension leads to a mechanical deformation of the crystal.


  • Copyright 2006
    Last updated 21 July 2006