BADDELEYITE
Chemical formula: ZrO2
Family: Oxides and hydroxides
Status: IMA-GP
Crystal system : Monoclinic
Display mineral: NON
Luminescence:
| | | |
Shortwave UV (254nm) colors: | Green ,
|
| Intensity SW:Strong
| Frequency SW:Very rarely
|
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Phosphorescence (in the common sense of the term) observable with the naked eye:
Type d'UV |
Couleur |
Intensité |
Fréquence d'observation |
UV courts (254 nm): | Green | | |
Activator(s) and spectrum:
Activator(s): n[TiO6] cluster, (UO2)2+ (ion Uranyle) en impureté, Sm3+, Dy3+, TiO6,
Peaks in the spectrum (nm):
TiO6 : broad band peaking at 520 - 550nm
Dy3+ : lines at 490nm
Sm3+ : 549nm
No spectrum yet
Comments on spectrum and activators:
Steady-state spectra of baddeleyite are characterized by bright green-blue luminescence which was ascribed to Ti impurity (Gaft et al. 1981a). Besides that, emission lines of trivalent Dy and Sm have been found (Eremenko and Khrenov 1982). (Gaft)
Activator: TiO6 (trace) with lines from Dy and Sm. Also possibly U.
Cathodoluminescence: greenish-blue (Khibiny);
Best localities for fluorescence (*):
- California State Gem Mine (Dallas Gem Mine; Benitoite Gem Mine), Santa Rita Peak, New Idria Mining District, San Benito Co., California, USA;
- carbonatite at Kovdor Massif, Kola Peninsula, Murmanskaja Oblast, Northern Region, Russia;
- Vuoriyarvi alkaline-ultrabasic massif, Northern Karelia, Murmanskaja Oblast, Northern Region, Russia;
- Khanneshin complex, Dushan District, Helmand Province, Afghanistan;
(*)The data are not exhaustive and are limited to a few remarkable localities for fluorescence
Bibliographic reference for luminescence:
- Fluorescence: Gems and Minerals Under Ultraviolet Light, Manuel Robbins, 1994, Geoscience Press, ISBN 0-945005-13-X ,
- Luminescence Spectroscopy of Minerals and Materials, M. Gaft, R. Reisfeld, G. Panczer, Springer Editor, ISBN: 10 3-540-21918-8 ,
- Luminescent Spectra of Minerals, Boris S. Gorobets and Alexandre A. Rogojine, Moscow, 2002 ,
Mineralogical reference on the Internet:
http://www.mindat.org/show.php?name=Baddeleyite
http://webmineral.com/data/Baddeleyite.shtml
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