DOUBTFULL FLUORESCENCE but cited by some authors
Chemical Formula: (Mn+2,Mg)6Zn3(AsO4)2(SiO4)(OH)8
Familly: Silicates
Status: IMA-GP
Crystal System: Orthorhombic
Mineral for Display: No
UV Type | Main color | Intensity | Observation Frequency |
---|---|---|---|
It was added to the list of fluorecent minerals of Franklin in 2014 after a study of all the sample of the Franklin Museum with blue light by Charles Mazel and Earl R Verbeeck. (see bibliography) Holdenite is best excited under true blue (440-450nm) light and show a dull olive-green luminescence. In LW there is no response and it was not considered as fluorescent before this study. Only a single specimen was tested and further study must be conducted. It could be that the yellow-green luminescence of willemite under the Holdenite excited by the powerfull blue led through this mineral is filtered by the pinkiish color of holdenite letting only a dim orange-yellow color to pass through.
(*)Data are not exhaustive and are limited to the most important localities for fluorescence
http://www.mindat.org/show.php?name=Holdenite
http://webmineral.com/data/Holdenite.shtml
Search for images on 'Google Image'
Search for documents in English on Google
Search for documents in any languages on Google