CALOMEL
Chemical Formula: alpha Hg2Cl2
Familly: Halides
Status: IMA-GP
Crystal System: Tetragonal
Mineral for Display: No
Luminescence:
UV Type |
Main color |
Intensity |
Observation Frequency |
|
| | | |
Long Waves (365nm): | Orange Red | | | Short Waves (254 nm): | Orange Red | | | | | | |
Phosphorescence (in the common meaning of the term) seen by naked eye:
No Data
Comments:
Fluo brightest under longwave than shortwave contrarly to similar fluorescing calcite;
The previously reported fluorescent Terlinguaite and Corderoite (two mercury minerals) seems to bee both non fluorescent.
Main Activator(s) and spectrum:
Most Common Activator:
Peaks in the spectrum (nm):
- band extending from 580nm to 640nm under SWUV;
No spectrum for the moment
Comments on activators and spectra:
Synthetic calomel used in chemical lab is also luminescent.Jack De Ment studied the luminescence spectrum of calomel in 1943. It consist of a bright red band extending from 580nm to 640nm under SW excitation.
Activator: "self-activated", the luminescence is produced by electron transfer between paired mercury atoms in different ionization states.
Synthetic calomel used in chemical lab is also luminescent.Jack De Ment studied the luminescence spectrum of calomel in 1943. It consist of a bright red band extending from 580nm to 640nm under SW excitation.
Best Locality for luminescence(*):
- Landsberg (Moschellandsberg), Alsenz-Obermoschel, Palatinate, Rhineland-Palatinate, Germany;
- Mariposa mine, Terlingua District, Brewster county, Texas, USA;
- Redwood City, San Mateo Co., California, USA;
(*)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 ,
Mineralogical Reference on internet:
http://www.mindat.org/show.php?name=Calomel
http://webmineral.com/data/Calomel.shtml
Search on Internet:
Search for images on 'Google Image'
Search for documents in English on Google
Search for documents in any languages on Google
Search on Wikipédia
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
via the contact page being sure to cite the source of information.