Lijst van fluorescerende mineralen


BENITOITE


Scheikundige formule: BaTiSi3O9

Familie: Silicaten

Status: IMA-GP

Kristal Systeem: Trikliniek

Mineraal om tentoon te stellen: Ja


Fluorescentie:


UV Type Kleur Intensiteit Frequentie van de observatie
Lange Golven (365nm):      Rood ZwakZelden
Korte Golven(254 nm):      Blauw wit Zeer sterkAltijd
    

Daglicht foto


BENITOITE;
Photo and Copyright: G. Barmarin

Lange golf foto (365nm)


BENITOITE, UVLW ;
Photo and Copyright: G. Barmarin

Korte golf foto (254nm)


BENITOITE, UVSW ;
Photo and Copyright: G. Barmarin

 

Foto galerij:

            ...

     Naar de volledige galerij (20 beelden in totaal)


Fosforescentie (in de algemene betekenis) zien met het blote oog:


UV Type Kleur Intensity Observation Frequency
Lange golven(365nm): Geen waarneming met het blote
Korte golven (254 nm): Geen waarneming met het blote
 

Activator en spectrum:


Voornaamste Activator: TiO6

Andere activatoren: Cr3+ , Fe3+ , Ti3+ , Ti4+ , Cu+ , Mn4+ , Ti - O ,

Pieks in het spectrum (nm):

TiO6 : 419nm
Ti3+ : broad band around 650-660nm with half-width of +/-135nm 
Cr3+ : 680nm
Mn4+ : 720nm
Cu+? replacing Ba2+ and Ti3+ (exc 337nm:(Gorobets)): 720nm
450nm (exc254nm)


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

      ...

  Vers la galerie de spectres (2 spectres au total)


Commentaar over activators en spectra:


Robbins cites Fe as activator for the red color and Ti for the blue; recent spectrographic studies give new data:
There are three broadbands:
- one around 419 nm (blue band) is connected with intrinsic luminescence centers, namely isolated TiO6 octahedra,
- one at 650 nm (Yellow band) for Ti3+ ,
- one at 720 (half-width 125nm) for Mn4+
and a narrow line at 680 for Cr3+.(Gaft)
Manganese participation is supported by chemical analysis of benitoite (0.03 to 0.11%).
The metastable level 3T1u is the emitting level at low temperatures with a long decay time of 1.1 ms. At higher temperatures an energy level with higher radiation probability must be involved in the emission process, and this level is situated at 0.06 eV higher than the lowest level. These two levels may be connected with 3T1u level splitting or with closely spaced 3T1u and 3T2u levels. Decay time shortening and thermal quenching are connected with nonradiative decay within the TiO6 luminescence center, while energy migration does not take place at least up to room temperature.
(Source: M. Gaft, L. Nagli, G. Waychunas and D. Weiss, The nature of blue luminescence from natural benitoite, Physics and Chemistry of Minerals, vol31, 2004)
The red emission of benitoite consists of two individual bands and one line and suggest that the activators of luminescence in benitoite system are Ti3+ and a d3 element, namely Cr3+ or Mn4+.
(Source: M. Gaft, L. Nagli, G. Waychunas and G. Panczer, The nature of red luminescence of natural benitoite, Mineralogy and Petrology, Vol85, 2005)


Beste vindplaats voor fluorescentie(*):


(*)Gegevens zijn niet exhaustieve, ze zijn beperkt tot de meest belangrijke plaatsen voor fluorescentie


Referentie voor fluorescentie:



Referentie voor luminenscentie op het internet:



Mineralogische Referentie op het internet:


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

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

Onderzoek op Internet:

  Beelden op 'Google Image'

  Dokumenten in het Nederlands op Google

  Dokumenten in alle talen op Google

  Onderzoek op Wikipédia


 

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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