Database of luminescent Minerals


BAVENITE


Chemical Formula: Ca4Be2Al2Si9O26(OH)2

Familly: Silicates

Status: IMA-GP

Mineral for Display: No


Luminescence:


UV Type Main color Intensity Observation Frequency
Long Waves (365nm):      Orange
Short Waves (254 nm):      Yellow
 

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


No Data

Thermoluminescence: Yes


Main Activator(s) and spectrum:


Most Common Activator: Mn2+

Other activators:            Sm3+ , Dy3+ , Tb3+ , Gd3+ ,

Peaks in the spectrum (nm):

Gd3+ : 319nm   

Sm3+562 and 594nm   

Dy3+ : 572nm   

Tb3+ : 495nm    

Mn2+ replacing Ca2+ : Broad band at 578nm 

No spectrum for the moment

Comments on activators and spectra:


"The bavenite luminescence takes place in the 5d electron shell that interacts strongly with the crystal field; the spectra bands assignment are Gd3+ (319 nm), Sm3+ (562 and 594 nm), Dy3+ (572 nm) and Tb3+ (495 nm). A Mn2+ band at about 578 nm in Ca2+ sites is present as a broad band that overlaps with the Dy3+, Sm3+ and Tb3+ bands. Mn2+ is a transition metal ion that has an electron configuration of 3d5 and interacts strongly with the crystal field (d → d) transition." (after The role of rare earth elements and Mn2+ point defects on the luminescence of bavenite, J. Garcia-Guinea, V. Correcher, A. Quejido, A. LaIglesia and N. Can, Talanta Volume 65, Issue 1, 15 January 2005, Pages 54-61)


Best Locality for luminescence(*):


(*)Data are not exhaustive and are limited to the most important localities for fluorescence


Bibliographical Reference for luminescence:



Luminescence Reference on internet:



Mineralogical Reference on internet:


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

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

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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.

 


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