Formula: HgTe
Reflected/transmitted colour: white with slightly grayish brown tint, tarnishing to dull purple
Pleochroism:
Optical isotropy/anisotropy: moderate anisotropy, dark brownish red to blue gray
Optical sign:
Refractive indices:
Bireflectance/Birefringence δ: weak or absent
2V angle:
Dispersion:
Optical orientation:
Optical axial plane:
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