Database of luminescent Minerals

DANBURITE

Chemical Formula: CaB₂(SiO₄)₂

Familly: Silicates

Status: IMA-GP

Crystal System: Orthorhombic

Mineral for Display: No

Luminescence:

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:

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⁺)

  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:

Images:

• Charcas, San Luis Potosí, Mexico: http://www.mindat.org/photo-651474.html

Mineralogical Reference on internet:

  http://www.mindat.org/show.php?name=Danburite

  http://webmineral.com/data/Danburite.shtml

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