Database of luminescent minerals 

PARAKELDYSHITE

Chemical formula: Na₂ZrSi₂O₇

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:

See KELDYSHITE.

Activator(s) and spectrum:

Activator(s): n[TiO₆] cluster,

Peaks in the spectrum (nm):

Very large band with max at 560 nm (Gorobets)

No spectrum yet

Comments on spectrum and activators:

Blue luminescence due to TiO6 ?

Cathodoluminescence: dark-blue.

Best localities for fluorescence (*):

• Pegmatite Roadcut at Bratthagen, Lågendalen, Hedrum, Larvik, Vestfold, Norway ;
• Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada;
• Rasvumchorr Mt, Khibiny Massif, Kola Peninsula, Murmanskaja Oblast, Northern Region, Russia (yellow SW);
• 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:

• 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 ,
• Luminescent Spectra of Minerals, Boris S. Gorobets and Alexandre A. Rogojine, Moscow, 2002 ,
• Mt St Hilaire Website: http://www.saint-hilaire.ca ,

Reference for luminescence on the Internet:

Mineralogical reference on the Internet:

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

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

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