Formula: (Ca,Na2,K2)2Si4O10 . 3H2O
Reflected/transmitted colour:
Pleochroism:
Optical isotropy/anisotropy: Biaxial
Optical sign: +
Refractive indices: α = 1.5-1.504, β = 1.505-1.51, γ = 1.513-1.519
Bireflectance/Birefringence δ: 0.013-0.015
2V angle: 78-80° (calculated), moderate (measured)
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 |