Tugtupite spectra

Tugtupite Visible Spectra (250 - 750 nm)

Tugtupite, Na₄BeAlSi₄O₁₂Cl, is an uncommon mineral which turns pink in strong sunlight and colorless when heated. The color orginates from minor amounts of sulphur in the mineral. The S₄ molecule is believed to be the species responsible for the red color.

GRR 153 spectrum, 4K; Red tugtupite from the Kvanefjeld plateau, Ilimaussaq complex, Greenland. 0.4 mm thick sample, unoriented. Data File: tugtupite153.

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last upgraded 12-July-2022