GIBBSITE
Chemical Formula: gamma Al(OH)3
Familly: Oxides and hydroxides
Status: IMA-GP
Crystal System: Monoclinic
Mineral for Display: No
Luminescence:
UV Type |
Main color |
Intensity |
Observation Frequency |
|
| | | |
Long Waves (365nm): | Yellowish White | | | Mid waves (320 nm): | Yellowish White | | | Short Waves (254 nm): | Yellowish White | | | | | | |
Other colors LW: | Greenish white , |
Other colors MW: | Greenish white , |
Other colors SW: | Green , Greenish , Greenish white , |
Phosphorescence (in the common meaning of the term) seen by naked eye:
UV Type |
Color |
Intensity |
Observation Frequency |
Long Wave (365nm): | Greenish white | | |
Mid Waves (320 nm): | Greenish white | | | Short Waves (254 nm): | Greenish white | | |
Main Activator(s) and spectrum:
Most Common Activator: (UO2)2+ (Uranyl ion) as impurities
No spectrum for the moment
Comments on activators and spectra:
Typical spectrum of the presence of uranyl ions (UO2+);
Best Locality for luminescence(*):
- Ilimaussaq complex, Kvanefjeld, Narsaq, Kitaa (West Greenland) Province, Greenland;
- Baoshan Prefecture, Yunnan Province, China (SW green);
- Richmond, Berkshire Co., Massachusetts, USA;
- Chester, PA, USA;
- Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada;
(*)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 ,
- 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 ,
- Luminescenza nel regno minerale, Guido Mazzoleni, fotografia Roberto Appiani, Libri Sandit, 2010, ISBN 978-88-95990-63-7 ,
Luminescence Reference on internet:
- MONT-SAINT-HILAIRE, History, Geology, Mineralogy, Laszlo HORVATH, The Canadian Mineralogist, Special Publication 14, 2019
Images:
Mineralogical Reference on internet:
http://www.mindat.org/show.php?name=Gibbsite
http://webmineral.com/data/Gibbsite.shtml
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Note: While all due attention has been paid to the implementation of the database, it may contain errors and/or accidental omissions. By nature, the database will always be incomplete because science always evolves according to new analysis.
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
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