Open AccessThe colour and luminescence of tugtupite (beryllosodalite) from Ilímaussaq
Author(s) -
A. S. Povarennykh,
A. N. Platonov,
A. N. Tarashchan,
V.P Belichenko
Publication year - 1971
Publication title -
bulletin
Language(s) - English
Resource type - Journals
eISSN - 2597-2936
pISSN - 0105-3507
DOI - 10.34194/bullggu.v95.6636
Subject(s) - luminescence , ion , crystal (programming language) , orange (colour) , chemistry , absorption spectroscopy , absorption (acoustics) , infrared , analytical chemistry (journal) , optics , physics , food science , organic chemistry , chromatography , computer science , programming language
Tugtupite, Na4 [BeAlSi4O12] Cl, is a mineral with bright pink colour and yellow-orange UV-luminescence. The visible region of the spectral absorption curves and the luminescence spectrum of tugtupite from the Ilímaussaq alkaline massif (South Greenland) were studied. Calculated and experimental values of vibrational frequencies of different molecular ions were compared, and it was established that the luminescence of tugtupite is caused by S2 molecular ions occupying the position of Cl ions in the crystal structure. These ions are also the cause of the colour of tugtupite, probably in combination with other, thermically less stable, radiation centres.