Database of luminescent minerals 

KELDYSHITE

Chemical formula: Na_2-xH_xZrSi₂O₇ nH₂O

Family: Silicates

Status: IMA-A

Display mineral: NON

Luminescence:

Daylight picture

KELDYSHITE and PARAKELDYSHITE xls, Mt Rasvumchorr, Khibiny massif,
Kola peninsula, MurmanskajaOblast, Russia;
Copyright 2006 S. Schneider,
The World of Fluorescent Minerals,
Used with permission of the author,

Shortwave (254nm) picture

KELDYSHITE and PARAKELDYSHITE xls, Mt Rasvumchorr, Khibiny massif,
Kola peninsula, MurmanskajaOblast, Russia;
Keldyshite fluoresce yellow SW and parakeldyshite white SW,
Copyright 2006 S. Schneider,
The World of Fluorescent Minerals,
Used with permission of the author,

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Phosphorescence (in the common sense of the term) observable with the naked eye:

No data

Comments:

voir aussi parakeldyshite. Blue luminescence due to TiO₆ (Gaft)

Activator(s) and spectrum:

Activator(s): n[TiO₆] cluster,

Peaks in the spectrum (nm):

Very large band with max at 555 nm and shoulder at 480 nm (Gorobets)

No spectrum yet

Best localities for fluorescence (*):

• Bratthagen, Lagendalen, Langesundfjord, Larvik Plutonic Complex, Norway;
• Mont St Hilaire, Quebec, Canada;
• Mt Rasvumchorr, Khibiny massif, Kola peninsula, Murmanskaja Oblast, Russia (light blue);
• Lovozero, Kola peninsula, Murmanskaja Oblast, Russia;

(*)The data are not exhaustive and are limited to a few remarkable localities for fluorescence

Bibliographic reference for luminescence:

• 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 ,

Reference for luminescence on the Internet:

Mineralogical reference on the Internet:

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

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

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