Brannockite

Formula: KSn2Li3Si12O30

Reflected/transmitted colour: colourless

Pleochroism:

Optical isotropy/anisotropy: uniaxial

Optical sign: -

Refractive indices: w = 1.567, e = 1.566

Birefringence δ: 0.001

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