Formula: PbCr2(CO3)2(OH)4·H2O
Reflected/transmitted colour:
Pleochroism: Colourless to pale grayish pink (X=Y), grayish pink (Z)
Optical isotropy/anisotropy: Biaxial
Optical sign: -
Refractive indices: α = 1.704, β = 1.802, γ = 1.842
Bireflectance/Birefringence δ: 0.138
2V angle: about 62° (calculated)
Dispersion:
Optical orientation: X = a, Y = b, Z = c
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 |