wernerite
Chemical Formula:See MEIONITE / (voir aussi/see also MARIALITE)
Familly: Silicates
Status:
Crystal System: Tetragonal
Mineral for Display: Yes
Luminescence:
UV Type |
Main color |
Intensity |
Observation Frequency |
|
| | | |
Long Waves (365nm): | Yellow | Very Strong | | Short Waves (254 nm): | Yellowish | Weak | | | | | |
Other colors LW: | Orangy yellow , |
Other colors SW: | Pale Yellow , |
Daylight Picture
Wernerite, Grenville, Argenteuil Co., Québec, Canada
Photo and Copyright: G. Barmarin
Long Waves Picture (365nm)
Wernerite UVLW, Grenville, Argenteuil Co., Québec, Canada
Photo and Copyright: G. Barmarin
Short Waves Pictures (254nm)
Wernerite UVSW, Grenville, Argenteuil Co., Québec, Canada
Photo and Copyright: G. Barmarin
Galerie de photos:
...
To the gallery (3 images in the gallery)
Phosphorescence (in the common meaning of the term) seen by naked eye:
No Data
Comments:
One of the most spectacular bright yellow luminescent mineral!
Main Activator(s) and spectrum:
Most Common Activator: S2-
Peaks in the spectrum (nm):
(S2)- : Very broad band peaking around 600-603 nm with some waves superposed
Col. G. Barmarin; Spectre: G. Barmarin
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To the spectrum gallery (1 spectra in the gallery)
Comments on activators and spectra:
De Ment studied the fluorescence spectrum of wernerite in 1943.
The emission spectrum is dependent upon excitation wavelength, indicating that S2- occupies several different sites.
The luminescence emission spectrum is peculiar in that it is a series of distinct, nearly equally spaced bands, covering the region from 500 to 700nm with maximum intensity just below 600nm. This luminescence was originally attributed to 2+ UO 2 . Kirk (1954; 1955) showed that the luminescence center was more likely to be a polysulfide ion, S,, and later (Schulman and Kirk, 1964) deduced it to be S 2. Similar luminescence is found in hackmanite and in sodium thiosulfate reduced at 900 ° C. under UV light. The luminescence of wernerite can be enhanced by heating the samples to 900 °C for 24 h. (see Burgner R, Scheetz B, White W (1978) Vibrational structure of the S2- luminescence in scapolite. Phys Chem Miner 2:317–324).
Best Locality for luminescence(*):
- Otter Lake, Grenville, Quebec, Canada ;
- McGill Scapolite Prospect (Mc Gill Farm), Pointe-au-Chêne, Grenville-sur-la-Rouge, Argenteuil RCM, Laurentides, Québec, Canada ;
- Grenville Scapolite Prospect, Grenville-sur-la-Rouge, Argenteuil RCM, Laurentides, Québec, Canada ;
- Valyermo, California, USA ;
- Fort Coulonge Quebec, Canada (associated with blue sodalite, hauyne fl.orange LW and diopside fl.blue SW);
- Old St. Joe Mine in Edwards NY, USA (1969, associated with lazurite, phlogopite fl. yellow SW, hauyne fl. orange LW, diopside fl.skyblue SW);
- Autoroute 50 roadcut, Argenteuil County, Quebec, Canada ;
- Beluga sapphire property, Kimmirut (Lake Harbour), Baffin Island, Nunavut Territory, Canada ;
- Lady Smith, Pontiac RCM, Outaouais, Québec, Canada exploited by Darryl MacFarlane around 1996 ;
(*)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 ,
- Handbook of Fluorescent Gems and Minerals, a practical guide for the gem and mineral collector, Jack de Ment, 1949 ,
Luminescence Reference on internet:
- Kirk, R.D.: Role of sulfur in the luminescence and coloration of some aluminosilicates. J. Electrochem. Soc. 101, 461–465 (1954)
- Kirk, R.D.: The luminescence and tenebrescence of natural and synthetic sodalite. Am. Mineral. 40, 22–31 (1955)
Images:
Mineralogical Reference on internet:
http://www.mindat.org/show.php?name=Wernerite
http://webmineral.com/data/Wernerite.shtml
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