Formula: TiO2
Reflected/transmitted colour: typically yellowish to reddish brown
Pleochroism: weak to distinct, ε > w in brownish red, yellow and green
Optical isotropy/anisotropy: uniaxial
Optical sign: +
Refractive indices: w = 2.605-2.613, ε = 2.899-2.901
Birefringence δ: 0.286-0.296
2V angle:
Dispersion: very strong
Optical orientation:
Optical axial plane:
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