Lijst van fluorescerende mineralen

PYROMORPHITE

Scheikundige formule: Pb₅(PO₄)₃Cl

Familie: Fosfaten, Arsenaten, Vanadaten

Status: IMA-GP

Kristal Systeem: Hexagonal

Mineraal om tentoon te stellen: Nee

Fluorescentie:

Fosforescentie (in de algemene betekenis) zien met het blote oog:

Commentaar:

Variety: campylite (rounded crystals)

Activator en spectrum:

Voornaamste Activator: Eu³⁺

Andere activatoren: Pb²⁺ , Ce³⁺ , Sm³⁺ , Eu³⁺ , Tb³⁺ , O^-₂ , VO₄^3- ,

Pieks in het spectrum (nm):

(VO4)^3- : Broad band peaking at 580nm

Ce³⁺ : 350, 375nm

Eu³⁺ : 580, 594, 611, 613, 615, 620, 622, 700nm

Sm³⁺ : 566, 603, 652nm

Nd³⁺ : 858, 889nm

Commentaar over activators en spectra:

Luminescence centers O₂^-  (Tarashchan 1978) and evidently (VO₄)^3- (Gaft 1984) characterize steady-state spectra of pyromorphite.

Laser-induced time-resolved technique enables to detect Ce³⁺, Eu³⁺, Sm³⁺ and Tb³⁺ emission centers and possibly Pb²⁺.

Excitation by CW laser with 532 and 780 nm revealed narrow luminescence lines possibly belonging to trivalent REE (Nd, Eu, Sm) and two luminescence bands peaking at 625 and 675 nm (sample from Les Farges, France, unknown activator).

Beste vindplaats voor fluorescentie(*):

• Rosenberg Mine, Braubach, Bad Ems District, Lahn valley, Rhineland-Palatinate, Germany (orange MW);
• Society Girl Mine, Moyie, British Colombia, Canada ;
• Dao Ping Mine, Guangxi Autonomous Region, China (a small percentage of the samples of this mine is yellow fluorescing MW; the lighter colored samples seem to have a better chance to be luminescent, appearing on the market in Ste marie aux Mines in 2007);
• Bunker Hill Mine, Bunker Hill properties, Kellogg, Coeur d Alene District, Shoshone Co., Idaho, USA (dull fluo SW+LW);
• Kabwe Mine, Broken Hill, Zambia (dull fluo SW yellowish brown);
• Resuperferolitica Mine, Minas Viejas, Santa Eufemia, Córdoba, Andalusia, Spain (fluo LW & SW);
• Les Farges Mine, Ussel, Corrèze, Nouvelle-Aquitaine, France (LW & SW);
• Pcheloyad Mine, Momchilgrad, Kardzhali Province, Bulgaria (LW);
• Broken Hill, Broken Hill district, Yancowinna Co., New South Wales, Australia (Very fluorescent long & short UV);
• Black Star pit, Mount Isa, Mount Isa City, Queensland  Australia (fluorescent long & short UV);

(*)Gegevens zijn niet exhaustieve, ze zijn beperkt tot de meest belangrijke plaatsen voor fluorescentie

Referentie voor fluorescentie:

• 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 ,

Referentie voor luminenscentie op het internet:

• Marvelous Midwave, Jeffrey Shallit, UV-Waves, vol.39, November-December 2009
• http://www.minerant.org/archief/fluo-Belgie.pdf

 

Images:

 

• Bad Ems, Germany MW: http://www.mindat.org/photo-33876.html
• Pcheloyad Mine, Momchilgrad, Kardzhali Province, Bulgaria

Mineralogische Referentie op het internet:

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

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

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