Telluronevskite

FormulaBi3TeSe2

Reflected/transmitted colour:

Pleochroism: Gray to bluish gray

Optical isotropy/anisotropy: Moderate without any strong chromatic effects

Optical sign:

Refractive indices:

Bireflectance/Birefringence δ: Weak, noticeable in oil, yellowish white to gray

2V angle:

Dispersion:

Optical orientation:

Optical axial plane:

 

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