Formula: (Fe,Pb)4S8O4
Reflected/transmitted colour: RL yellow with a brassy hue
Pleochroism:
Optical isotropy/anisotropy: RL very strong in orange, yellow orange, gray with green hue
Optical sign:
Refractive indices:
Bireflectance/Birefringence δ: RL distinct, grayish brown to orange to yellow-orange
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 |