Database of luminescent Minerals


Chemical Formula: Ca12(Zr,Ti)4(Si2O7)4(O,F)8

Familly: Silicates

Status: IMA-A

Crystal System: Monoclinic

Mineral for Display: No


UV Type Main color Intensity Observation Frequency
Short Waves (254 nm):      Pale Yellow
Other colors SW:          
Yellowish White , Yellowish ,

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

No Data

Main Activator(s) and spectrum:

Most Common Activator: Ti4+

Other activators:            TiO6 ,

Peaks in the spectrum (nm):

 large band near 580nm and two small bands at 318 and 397nm 

TiO6 : broad band at 525nm

No spectrum for the moment

Comments on activators and spectra:

The photoluminescence (PL) spectrum at 300 K consists of one large band near 580 nm and two small UV bands at 318 and 397 nm. The optical excitation spectrum of the bright yellow fluorescence consists of two bands near 220 and 250 nm. The temperature dependence of the PL intensity exhibits linear thermal quenching.

Baghdadite from Fuka, Okayama Prefecture, Japan shows a bright yellow fluorescence under UV (Hg 253.7 nm) excitation (Sidike et al. 2006) which was ascribed to the existence of titanium. Gaft study of decay time revealed that it is equal of approximately 10 μs, which corresponds to TiO6 emission properties.

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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