Lijst van fluorescerende mineralen


SPODUMENE


Scheikundige formule: LiAlSi2O6

Familie: Silicaten

Status:

Kristal Systeem: Monoklieniek

Mineraal om tentoon te stellen: Ja

Fluorescerende variëteiten:  hiddenitekunzite

Fluorescentie:


UV Type Kleur Intensiteit Frequentie van de observatie
Lange Golven (365nm):      Oranje rood (Zalmkleurig)
Korte Golven(254 nm):      Oranje
    
Andere kleuren lange golven:                         
Oranje , Bruin , Oranje rood (Zalmkleurig) , Violet roos , Zalm roos ,
Andere kleuren korte golven:     
Blauw ,

Lange golf foto (365nm)


OL (365 nm). Col. G. Barmarin; Photo: G. Barmarin

 

Foto galerij:

            ...

     Naar de volledige galerij (7 beelden in totaal)


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


UV Type Kleur Intensity Observation Frequency
Lange golven(365nm): Oranje
Midden Golven (320 nm): Oranje
Korte golven (254 nm): Oranje
 

Tenebrescencie: Ja



Thermoluminescencie: Ja


Commentaar:


Variety triphane (colorless), Kunzite (pink) and Hiddenite (green).


Activator en spectrum:


Voornaamste Activator: Mn2+

Andere activatoren: Cr3+ , Fe3+ ,

Pieks in het spectrum (nm):

Mn2+ substituting for Li : broad band around 595 - 615nm (10ms)

Cr3+ : 676, 690nm (peak)

Fe3+ : 685nm (5 ms)


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


Commentaar over activators en spectra:


Mn2+ is shown to be mainly in Li-sites rather than Al-sites and gives rise to a broad emission centered at 600 nm. In Cr-rich crystals only one R1 line is observed and Cr3+ emission is evident at room temperature. In green hiddenite crystals, Cr3+ emission is dominant at room temperature where the R-lines are superimposed on a broad-band emission. (Source: Luminescence spectroscopy of Cr3+ and Mn2+ in spodumene (LiAlSi2O6), WALKER G. see below).

 

Spodumen is a monoclinic pyroxene with two not equivalent metal cation sites M1 and M2. The aluminum occupies the smaller M1 site, which is approximately octahedral (actual symmetry C2) with an average metal-oxygen distance of 1.92 A. The M2 site, occupied by Li, is also six-fold coordinated with an average metal-oxygen distance of 2.23 Å. Both Al and Li sites may be substitutionally replaced by ions of the transitional metals in various proportions.

Both Mn2+ and Cr3+ centers have been identified in luminescence spectra by steadystate spectroscopy (Tarashchan 1978; Walker et al. 1997).

Besides, long lived deep red luminescence was found supposedly generated by Fe3+ especially in the specimen fluorescing a bright lilac color under SW, light peach LW and having a violet (not pink) color in daylight.

At room and lower temperatures only one emission band of Mn2+ occurs. 

It is very probable that Mn2+ ions in the spodumen matrix is present only in one site and that Mn2+ is mainly in Li-sites rather than Al-sites. (Gaft)

 


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=Spodumene

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

Onderzoek op Internet:

  Beelden op 'Google Image'

  Dokumenten in het Nederlands op Google

  Dokumenten in alle talen op Google

  Onderzoek op Wikipédia


 

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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.

 


Snel opzoeking van een fluorescerend mineraal: