Database of luminescent Minerals

BASTNAESITE-(Ce)

Chemical Formula: (Ce,La)(CO₃)F

Familly: Carbonates

Status: IMA-GP

Crystal System: Hexagonal

Mineral for Display: No

Luminescence:

Phosphorescence (in the common meaning of the term) seen by naked eye:

Main Activator(s) and spectrum:

Most Common Activator: Sm³⁺

Other activators:            Eu³⁺ , Dy³⁺ , Tb³⁺ ,

Comments on activators and spectra:

With unfiltered SWUV - dull green fluorescence (not true fluorescence - optical effect created by the selective absorption of yellow, blue and violet color by the Nd letting the green color of the lamp alone to be reflected).

Photoluminescence studies of bastnasite confirmed the presence of at least four trivalent rare earths, such as Sm, Eu, Dy and Tb in trace quantities.

The rare earth ions are situated at distorted sites in the system surrounded by defect centers (Mohapatra et al. 2014). (Gaft)

Best Locality for luminescence(*):

• Zagi Mountain, Hameed Abad Kafoor Dheri, Peshawar, Khyber Pakhtunkhwa, Pakistan ;

(*)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 ,
• Luminescence Spectroscopy of Minerals and Materials, M. Gaft, R. Reisfeld, G. Panczer, Springer Editor, ISBN: 10 3-540-21918-8 ,

Luminescence Reference on internet:

• http://www.flickr.com/photos/bob_81667

Mineralogical Reference on internet:

  http://www.mindat.org/show.php?name=Bastnaesite-(ce)

  http://webmineral.com/data/Bastnaesite-(ce).shtml

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