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Rutile (TiO2)

Rutile has a tetrahedral crystal structure with 4/m 2/m 2/m symmetry. It has a large birefringence, a wide transmission range, and good mechanical and chemically properties, which make it suitable for fabrication of polarizing parts.

  Transparency Range (nm) 430~5500
  Crystal Symmetry Class Tetragonal
  Crystal Class Positive Uniaxial
  Hygroscopic Susceptibility None
     Coefficient of Thermal Expansion (/K)     at 313K
||C: 9.2X10-6
C: 7.1X10-6
        Thermal Conductivity (W/m·K)              at 273K
||C: 13.0
C: 9.0
  Refractive Indices no=2.555, ne=2.836 at 690nm
no=2.454, ne=2.71 at 1530nm
  Density (g/cm3) 4.25
  Mohs Hardness 6.2
  Table 1: Rutile physical and optical properties

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