Database of luminescent Minerals
WHEWELLITE
Chemical Formula: CaC2O4 H2O
Familly: Organic
Status: IMA-GP
Crystal System: Monoclinic
Mineral for Display: No
Luminescence:
| UV Type | Main color | Intensity | Observation Frequency |
|---|---|---|---|
| Long Waves (365nm): | Bluish White | Strong | Short Waves (254 nm): | Bluish White | Medium |
Daylight Picture
Whewellite, Dolny, Bilina, Tchéquie.
Photo and Copyright: Gérard Barmarin.
Long Waves Picture (365nm)
Whewellite, UVLW, Dolny, Bilina, Tchéquie.
Photo and Copyright: Gérard Barmarin.
Short Waves Pictures (254nm)
Whewellite, UVSW, Dolny, Bilina, Tchéquie.
Photo and Copyright: Gérard Barmarin.
Galerie de photos:
... 
To the gallery (5 images in the gallery)
Phosphorescence (in the common meaning of the term) seen by naked eye:
| UV Type | Color | Intensity | Observation Frequency |
|---|---|---|---|
| Long Wave (365nm): | Greenish white | Strong | Short Waves (254 nm): | Greenish white | Weak |
Comments:
Occurs as calculi or as a sediment in the human urinary tract. Also described as a product of fungal activity in Limecrusts, some calcretes, leaf litter and soils in forests; also formed by lichen on various rocks (basalts, serpentinites, Cu-bearing rocks, gabbroes, dolerites, andesites); Cleaning any specimen containing Ca-bearing soluble species with oxalic acid will lead to crystallisation of whewellite or weddellite. (see https://www.mindat.org/min-4276.html)
Main Activator(s) and spectrum:
Most Common Activator: Organic impurities
Peaks in the spectrum (nm):
410nm, 480nm, 512nm 546nm 604nm 708nm
Whewellite, Dolny, Tchequie.
Excitation: laser 405nm. Col. G. Barmarin; Spectre: G. Barmarin
Comments on activators and spectra:
Whewellite is often polluted by organic compound probably causing the fluorescence and phosphorescence (Humic acid? polycyclic aromatic hydrocarbons?).
Best Locality for luminescence(*):
- Crystals in septarian concretions of Elk Creek, Meade county, South Dakota, USA;
- Dolny, Bilina, Tchéquie;
- Bílina coal mine, Bílina (Bilin), Ústí Region, Bohemia (Böhmen; Boehmen), Czech Republic;
- Paitzdorf, Ronneburg U deposit, Gera, Thuringia, Germany (former DDR);
- Burgk, Dresden, Saxony, Germany;
- Ležáky quarry, Most, North Bohemia, Czech Republic;
(*)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 ,
- Luminescent Spectra of Minerals, Boris S. Gorobets and Alexandre A. Rogojine, Moscow, 2002 ,
Luminescence Reference on 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
- http://www.crlc.ca/FluorescentMineralDatabase1.pdf
Mineralogical Reference on internet:
http://www.mindat.org/show.php?name=Whewellite
http://webmineral.com/data/Whewellite.shtml
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