Formula: Pb7SiO8Cl2
Reflected/transmitted colour: pale yellow to colourless
Pleochroism:
Optical isotropy/anisotropy: uniaxial, weakly anisotropic in oil, gray; not noticeable in air
Optical sign: -
Refractive indices: w = 2.39, e = 2.32
Birefringence δ: 0.07
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 |