Formula: Sr2B11O16(OH)5.H2O
Reflected/transmitted colour: Colourless
Pleochroism:
Optical isotropy/anisotropy: Biaxial
Optical sign: +
Refractive indices: α = 1.551, β = 1.553, γ = 1.620
Bireflectance/Birefringence δ: 0.069
2V angle: 22° (calculated), 37° (measured)
Dispersion: Perceptible, r > v
Optical orientation: X = b, Y Ù a = -2°
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 |