Lijst van fluorescerende mineralen


Scheikundige formule: BeAl2O4

Familie: Oxiden en Hydroxiden

Status: IMA-GP

Kristal Systeem: Orthorhombisch

Mineraal om tentoon te stellen: Nee

Fluorescerende variëteiten:  alexandrite


UV Type Kleur Intensiteit Frequentie van de observatie
Lange Golven (365nm):      Rood Zeer zwak
Midden Golven (320 nm):      Rood
Korte Golven(254 nm):      Rood Zeer zwak
Andere kleuren korte golven:     
Groen geel ,

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

Geen fosforescentie zien met het blote oog met alle golven


Varété alexandrite: fluorescence rouge due au chrome (Cr2+)
Chrysobéryl classique: jaune vert, crème, verdâtre;

Activator en spectrum:

Voornaamste Activator: Cr3+

Andere activatoren: V2+ ,

Pieks in het spectrum (nm):

Cr3+ replacing Al  : 678, 680 nm 

V2+ : band around 720 nm (80nm half-width)  (Gaft), 

VO6 : broad band at 645nm (FWHM: 120nm)

TiO6 : 516nm (FWHM: 115nm) (Gaft), band at 540 nm (Gorobets), 

689, 698, 703nm (Gaft)

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

Commentaar over activators en spectra:

The Al3+ ions are octahedrally coordinated by the oxygen ions and occur in two not equivalent crystal field sites in the lattice.

The Cr3+ ions replace substitutionally the Al3+ ions, 78 % replacing Al3+ ions in one position and the rest going into the second sites.

The major features of the spectra at 300 K are the two sharp lines R1m (m for mirror, the first position for Al3+ replacement) and R2m peaking at 680 nm and a broad, structured band peaking at lower energies. The 689.5 and 695.2 nm decay time is much larger than that for the 677.9 and 679.5 nm emission (Suchoki et al. 1987).

At certain excitation wavelengths, such as 488nm, the R1i (i for inversion) and R2i peaking at 690.0 and 695.0 nm lines associated with Cri ions in inversion sites (second site) appear (Powell et al. 1985)


The Cr3+ luminescence properties in natural chrysoberyl minerals have been studied as a function of the Cr content as well as impurities such as Fe and V.

A competition was found between Cr and V for very low Cr concentration with the vanishing of Cr3+ emission from Cr3+ ions located in inversion site. The Fe3+ ions

substitute in mirror site efficiently with a strong impact on the Cr3+ lifetime of mirror site (Ollier et al. 2015).


Cathodoluminescence: red;

Beste vindplaats voor fluorescentie(*):

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

Referentie voor fluorescentie:

Mineralogische Referentie op het internet:

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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Snel opzoeking van een fluorescerend mineraal: