Formula: SnO2
Reflected/transmitted colour: almost colourless, yellow, brown or red
Pleochroism: variable - very weak to strong, yellow, brown or red, absorption ε > w
Optical isotropy/anisotropy: uniaxial
Optical sign: +
Refractive indices: w = 1.990-2.010, ε = 2.093-2.100
Birefringence δ: 0.096-0.098
2V angle:
Dispersion: strong
Optical orientation:
Optical axial plane:
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