Database of luminescent Minerals


Chemical Formula: AlO(OH)

Familly: Oxides and hydroxides

Status: IMA-GP

Crystal System: Orthorhombic

Mineral for Display: No


UV Type Main color Intensity Observation Frequency
Short Waves (254 nm):      Yellowish White
Other colors LW:     
Red ,

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

No Data

Main Activator(s) and spectrum:

Most Common Activator: Cr3+

Peaks in the spectrum (nm):

Spectrum: Michael Gaft, Petah Tikva, Israel. Plot: Institute of Mineralogy, University of Vienna, Austria, with permission of the authors.


  To the spectrum gallery (2 spectra in the gallery)

Comments on activators and spectra:

Laser induced luminescence shows lines for Cr3+ at 692 and 694 nm, typical of 2E→4A2 transitions of Cr3+ luminescence centers (R-lines) substituting for Al3+ in six-fold coordination.
Yellow luminescence activator not known

Best Locality for luminescence(*):

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

Bibliographical Reference for luminescence:

Luminescence Reference on internet:

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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