Thin section showing sodalite crystals, dark gray on
LPA picture below (cubic mineral) surrounded by aenigmatite (dark brown)
and aegirine ( green needles).
Reflection images of sodalite and nepheline. 15:
sodalite, darker in LPNA due to lower refraction index and 16: nepheline.
In the LPA image below, both minerals cannot be distinguished from each
Raman spectra of sodalite and nepheline from crystals
15 and 16.
Green needles of aegirine around nepheline. LPNA
picture above indicates a high refraction index for this mineral. White
material is feldspar (below).
Aegirine Raman spectrum from the section reproduced