DANBURITE
Chemical Formula: CaB2(SiO4)2
Familly: Silicates
Status: IMA-GP
Crystal System: Orthorhombic
Mineral for Display: No
Luminescence:
UV Type |
Main color |
Intensity |
Observation Frequency |
|
| | | |
Long Waves (365nm): | Blue | | | Short Waves (254 nm): | Blue | Weak | | | | | |
Other colors LW: | Bluish Green , Violet , Violet blue , |
Other colors SW: | Green , Bluish Green , |
Daylight Picture

DANBURITE ,
Photo and Copyright: James Hamblen
Site of the author
Used with permission of the author
Short Waves Pictures (254nm)

DANBURITE under UVSW,
Photo and Copyright: James Hamblen
Site of the author
Used with permission of the author
Phosphorescence (in the common meaning of the term) seen by naked eye:
No Data
Triboluminescence: Yes
Main Activator(s) and spectrum:
Most Common Activator: Eu2+
Other activators: (UO2)2+ (Uranyl ion) as impurities , Ce3+ , Sm3+ , Eu3+ , Dy3+ , Tb3+ , Mn2+ , Nd3+ , Yb2+ ,
Peaks in the spectrum (nm):
Ce3+: 346 - 347, 367nm
Eu2+: 437 - 438, 455nm
Yb2+: 535nm
Eu3+: 580, 592, 610 - 611 - 613, 618 - 620, 654, 690nm
(All REE replacing Ca2+)

Spectrum: Michael Gaft, Petah Tikva, Israel. Plot: Institute of Mineralogy, University of Vienna, Austria, with permission of the authors.

...
To the spectrum gallery (6 spectra in the gallery)
Comments on activators and spectra:
Triboluminescence cited by De Ment (1947).
Luminescence centers Eu2+, Yb2+, Ce3+, Dy3+ and Sm3+ characterize steady-state spectra of danburite (Gaft et al. 1979).
Best Locality for luminescence(*):
- Aurora Mine, Charcas Mineral District, Mun. de Charcas, San Luis Potosí, Mexico (bright yellow green or bright violet-blue LW+SW);
- Japan, locality unknown (bright blue LW);
- Mogok Township, Pyin-Oo-Lwin District, Mandalay Division, Burma (bright green-blue LW);
- Hormuz Island, Hormozgan Province, Iran (modest yellow-green SW and purple LW);
(*)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 ,
- Luminescence Spectroscopy of Minerals and Materials, M. Gaft, R. Reisfeld, G. Panczer, Springer Editor, ISBN: 10 3-540-21918-8 ,
- Luminescent Spectra of Minerals, Boris S. Gorobets and Alexandre A. Rogojine, Moscow, 2002 ,
- Handbook of Fluorescent Gems and Minerals, a practical guide for the gem and mineral collector, Jack de Ment, 1949 ,
Luminescence Reference on internet:
Mineralogical Reference on internet:
http://www.mindat.org/show.php?name=Danburite
http://webmineral.com/data/Danburite.shtml
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