Formula: Na2CO3.H2O
Reflected/transmitted colour: Colourless
Pleochroism:
Optical isotropy/anisotropy: Biaxial
Optical sign: -
Refractive indices: α = 1.420, β = 1.506, γ = 1.524
Bireflectance/Birefringence δ: 0.104
2V angle: 46° (calculated), 48° (measured)
Dispersion: Weak, r < v
Optical orientation: X = b, Y = c, Z = a
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 |