Luminescence, fluorescence and phosphorescence of minerals

ESPERITE

Chemical Formula: PbCa₃Zn₄(SiO₄)₄

Familly: Silicates

Status: IMA-A

Crystal System: Monoclinic

Mineral for Display: Yes

Associated names (luminescent varieties, discredited names, synonymes etc.): calcium larsenite,

Luminescence:

UV Type	Main color	Intensity	Observation Frequency

Long Waves (365nm):	Yellowish White	Weak
Short Waves (254 nm):	Yellow	Very Strong	Always

Daylight Picture

ESPERITE,
Photo and Copyright: James Hamblen
Site of the author
Used with permission of the author

Short Waves Pictures (254nm)

ESPERITE under UVSW,
Photo and Copyright: James Hamblen
Site of the author
Used with permission of the author

Galerie de photos:

...

To the gallery (3 images in the gallery)

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

No Data

Thermoluminescence: Yes

Comments:

synonyme: calcium larsenite. Associated with willemite (green), hardystonite (dark-blue), calcite (red) and clinohédrite (orange), esperite from franklin give the most exciting combinaison of luminescent colors in one sample.

Main Activator(s) and spectrum:

Most Common Activator: Mn²⁺

Other activators: Ce³⁺ , Sm³⁺ , Dy³⁺ ,

Peaks in the spectrum (nm):

Ce³⁺: 400nm
Mn²⁺ replacing Zn: narrow band peaking at 540-545nm
Sm³⁺ replacing Ca²⁺: small peaks at 600, 645nm
Dy³⁺ replacing Ca²⁺: 482, 575nm
Reabsorption at 580nm by Nd³⁺ and at 660nm by UO²⁺

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

...

To the spectrum gallery (3 spectra in the gallery)

Comments on activators and spectra:

Activator: Mn²⁺ (6 coordinated) in Zn and Ca position accompanied by Ce3+,Dy3+ and Sm3+ lines (Gaft).
Decay time: 9 ms

Best Locality for luminescence(*):

Franklin, New Jersey, USA;
El Dragón mine, Antonio Quijarro Province, Potosí Department, Bolivia (microcrystals);

(*)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 ,
Ultraviolet Light and Fluorescent Minerals, Th. Warren, S. Gleason, R. Bostwick, et E. Verbeek, 1995, ISBN 0-9635098-0-2 ,
Franklin Website: http://franklin-sterlinghill.com ,

Luminescence Reference on internet:

Mineralogical Reference on internet:

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

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

Search on Internet:

Search for images on 'Google Image'

Search for documents in English on Google

Search for documents in any languages on Google

Search on Wikipédia

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.

Database of luminescent Minerals