Database of luminescent Minerals

tourmaline

Chemical Formula:See DRAVITE / (Group: see/voir ELBAITE, UVITE, DRAVITE)

Familly: Silicates

Status: NR

Crystal System: Rhomboedric

Mineral for Display: No

Luminescence:

Daylight Picture

TOURMALINE;
Photo and Copyright: James Hamblen
Site of the author
Used with permission of the author

Short Waves Pictures (254nm)

TOURMALINE;
UVSW
Photo and Copyright: James Hamblen
Site of the author
Used with permission of the author

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

Main Activator(s) and spectrum:

Most Common Activator: Cr³⁺

Other activators:            Fe³⁺ , Mn²⁺ ,

Peaks in the spectrum (nm):

Cr³⁺ : lines at 691, 697, 707 nm   
Fe³⁺ : band at 700 - 750 nm   
Mn²⁺ : band at 560 - 570 nm  

  To the spectrum gallery (1 spectra in the gallery)

Comments on activators and spectra:

Under lamps excitation tourmaline is practically non-luminescent, while under X-ray excitation it exhibits impurity luminescence from Fe3+ centered at 700–750 nm and Mn2+ centered at 560–570 nm (Kusnetsov and Tarashchan 1988). (Gaft)

Activators: Cr3+ (lines at 691, 697, 707 nm), Fe3+ (band at 720 - 750 nm), Mn2+ (band at 560 - 570 nm)

Best Locality for luminescence(*):

(*)Data are not exhaustive and are limited to the most important localities for fluorescence

Bibliographical Reference for luminescence:

• The Henkel Glossary of Fluorescent Minerals, Dr. Gerhard Henkel, Published by the FMS, 1989 ,
• Luminescence Spectroscopy of Minerals and Materials, M. Gaft, R. Reisfeld, G. Panczer, Springer Editor, ISBN: 10 3-540-21918-8 ,

Mineralogical Reference on internet:

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

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

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