Database of luminescent Minerals


NOT FLUORESCENT but cited by some authors

DOUBTFULL FLUORESCENCE but cited by some authors

Chemical Formula: Ca(UO2)6O4(OH)6 8H2O

Familly: Oxides and hydroxides

Status: IMA-GP

Mineral for Display: No


UV Type Main color Intensity Observation Frequency
Long Waves (365nm):      Green Very weak
Short Waves (254 nm):      Green Very weak

Phosphorescence (in the common meaning of the term) seen by naked eye:

UV Type Color Intensity Observation Frequency
Long Wave (365nm): None by naked eye


To be checked;
Sources diverge for luminescence. Usually cited as non-fluorescent at room temperature in the litterature.
Spectra in Liquid Nitrogen (Gorobets): 18550 cm-1, 17920 cm-1, 17390 cm-1 ;

Main Activator(s) and spectrum:

Most Common Activator: (UO2)2+ (Uranyl ion) intrinsic

Peaks in the spectrum (nm):

518.9, 535.6, 553.4, 578.9 (In liquid Nitrogen)

No spectrum for the moment

Best Locality for luminescence(*):

(*)Data are not exhaustive and are limited to the most important localities for fluorescence

Bibliographical Reference for luminescence:

Mineralogical Reference on internet:

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Note: While all due attention has been paid to the implementation of the database, it may contain errors and/or accidental omissions. By nature, the database will always be incomplete because science always evolves according to new analysis.
A request providing no result means only that no such reference exists in the database, but it does not mean that what you are looking for does not exist, just not to our knowledge. If you think you have found an error or omission, please let us know via the contact page being sure to cite the source of information.


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