Database of luminescent Minerals


DELHAYELITE


Chemical Formula: (Na,K)10Ca5Al6Si32O80(Cl2,F2,SO4)3 18H2O

Familly: Silicates

Status: IMA-GP

Mineral for Display: No


Luminescence:


UV Type Main color Intensity Observation Frequency
Long Waves (365nm):      Orange Strong
Short Waves (254 nm):      Orange Medium
 

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


No Data

Comments:


Named in 1959 by Th. G. Sahama and K. Hytönen after Fernand Delhaye (Clermont-Ferrand February 4 1880 - Saint-Gillis (Brussels) December 15 1946), of Belgian nationality. He worked in Central Africa (Type locality for Delhayeite: Mt Shaheru, Mt Nyiragongo, Goma, Kivu, Democratic Republic of Congo (Zaïre) type specimen conserved at Royal Museum for Central Africa, Tervuren seems not to be luminescent).


Main Activator(s) and spectrum:


Most Common Activator: S2-

Peaks in the spectrum (nm):

S2- : 564, 584, 608, 622, 645, 664, 692, 719, 747nm


Delhayelite.
Excitation: laser 405nm. Col. G. Barmarin; Spectre: G. Barmarin

         ...

  To the spectrum gallery (3 spectra in the gallery)


Comments on activators and spectra:


Similar to the spectrum of Afghanite but the "waves" are not as well developped.


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:


  http://www.mindat.org/show.php?name=Delhayelite

  http://webmineral.com/data/Delhayelite.shtml

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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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