Formula: Bi4(S,Se)3
Reflected/transmitted colour: opaque, polished section pure white inclining to cream coloured with strong bright red internal reflections
Pleochroism:
Optical isotropy/anisotropy: polished section very strong anisotropy
Optical sign:
Refractive indices:
Birefringence δ/bireflectance: not perceptible in both air and oil
2V angle:
Dispersion:
Optical orientation:
Optical axial plane:
| Back to Alphabetical list | Colour photos | Physical, chemical and crystallographic description | SEM images | TEM images | vibrational spectra description | IR spectra | Raman spectra | N-IR spectra | F-IR spectra | IES spectra |