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Nature’s Rainbows is a non-commercial web site maintained entirely by volunteer hobbyists and contributors.  Our mission is to provide information about UV and luminescence, premium fluorescent mineral photos, and a fluorescent mineral database for the enjoyment of FL mineral collectors around the world.  Information on this web site is covered under a Creative Commons License.


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Tyuyamunite from Mexico

Tyuyamunite: Margaritas No. 1 Mine, Sierra Peña Blanca, Peña Blanca District, Mun. de Aldama, Chihuahua, Mexico

This is a calcium uranyl vanadate. The vanadate ion has some proper fluorescence of it's own, so it overlaps with the familiar uranyl fingerprint. This makes it difficult to say anything sensible when looking at the emission spectrum. Interested parties may freely download the spectral data from my website: both in cm-1 and in µW/cm²/nm or absolute spectral irradiation. The fluorescence was photographed in 405 nm laser light. The white light photo was taken in halogen light.

It's not a very desirable specimen but it is representative for the species.

 

 

 

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