QUARTZ
Chemical formula: SiO2
Family: Oxides and hydroxides
Status: IMA-A
Crystal system : Rhomboedric
Display mineral: OUI
Associated names (luminescent varieties, discredited names, synonyms, etc.): agate, amethyste, calcedoine, herkimer diamond, Jaspe, onyx,
Luminescence:
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Longwave UV (365nm) colors: | Yellow , Bluish White , Orangy yellow , Greenish Yellow ,
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| | Frequency LW:Rarely
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Midwave UV (320nm) colors: | Yellow , Bluish White , Orangy yellow , Greenish Yellow ,
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| | Frequency MW:Very rarely
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Shortwave UV (254nm) colors: | Yellow , Bluish White , Orangy yellow , Red , Greenish Yellow ,
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| | Frequency SW:Very rarely
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Longwave (365nm) picture
OL (365 nm). Col. G. Barmarin; Photo: G. Barmarin
Pictures Galery:
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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 longs (365nm): | White | Very weak | |
UV moyens (320 nm): | White | Very weak | | UV courts (254 nm): | White | Very weak | |
Triboluminescence: OUI
Thermoluminescence: OUI
Comments:
Activator(s) and spectrum:
Activator(s): (UO2)2+ (ion Uranyle) en impureté, ST (Singlet-triplet)-Matière organique en impureté, Fe3+,
Peaks in the spectrum (nm):
Fe3+ : 680 nm (Gorobets)
Oil inclusions : 437, 489, 512, 546, 601nm
Quartz from La Sassa, Italy: 500, 520, 555, 595, 666nm
Quartz with "Oil Inclusions".
Excitation: led 370nm. Col. G. Barmarin; Spectre: G. Barmarin
Spectrum Galery:
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Comments on spectrum and activators:
Cathodoluminescence: blue or yellow.
Best localities for fluorescence (*):
- La Sassa, Montecatini Val di Cecina, Pisa Province, Tuscany, Italy (yellowish LW, bright yellow SW);
- Asbach, former DDR (SW Orange, LW Red);
- Hanley Road, Hudson, Wisconsin, USA (fl. medium yellow-orange SW+LW);
- Wadh, Khuzdar District, Balochistan, Pakistan (petroleum/oil inclusion strongly fluorescent with bubble)
(*)The data are not exhaustive and are limited to a few remarkable localities for fluorescence
Bibliographic reference for luminescence:
- The Henkel Glossary of Fluorescent Minerals, Dr. Gerhard Henkel, Published by the FMS, 1989 ,
- Fluorescence: Gems and Minerals Under Ultraviolet Light, Manuel Robbins, 1994, Geoscience Press, ISBN 0-945005-13-X ,
- The World of Fluorescent Minerals, Stuart Schneider, Schiffer Publishing, 2006, ISBN 0-7643-2544-2 ,
- Luminescent Spectra of Minerals, Boris S. Gorobets and Alexandre A. Rogojine, Moscow, 2002 ,
- Mt St Hilaire Website: http://www.saint-hilaire.ca ,
Reference for luminescence on the Internet:
- UV-Waves September/October 1996, UV Minerals in former East Germany by H.J.Weller and J. Slacik reprinted from Fundgrube, XXVI, 1990,#3
- UV-Waves (Journal Of The Fluorescent Mineral Society), 2012, Volume 32: A preliminary report: The glowing quartz from La Sassa, Tuscany, Italy, Antonello Dallegno and Guido Mazzoleni.
- MONT-SAINT-HILAIRE, History, Geology, Mineralogy, Laszlo HORVATH, The Canadian Mineralogist, Special Publication 14, 2019
Images:
Videos:
Mineralogical reference on the Internet:
http://www.mindat.org/show.php?name=Quartz
http://webmineral.com/data/Quartz.shtml
Internet Search:
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