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Scapolite. Colours can fool you



A typical scapolite (marialitic) from the Koksha Valley, Badakhshan, Afghanistan. In UV-A (365 nm LED) we see the typical S2- vibronic emission. In UV-C (275 nm LED) we see also a yellow emission, but this not a weakened S2- emission. The resulting colour is caused by the usual bright red Fe3+ emission (usually seen alone), together with a violet Ce3+ emission. There is also a weak band in the green.

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