Database of luminescent Minerals

MEIONITE

Chemical Formula: 3CaAl₂Si₂O₈CaCO₃

Familly: Silicates

Status: IMA-GP

Crystal System: Tetragonal

Mineral for Display: No

Luminescence:

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

Comments:

SCAPOLITE Group see also MARIALITE and WERNERITE
Mizzonite = variety of MEIONITE (intermediate with MARIALITE and MEIONITE but with predominantly the last one.

Main Activator(s) and spectrum:

Most Common Activator: S₂^-

Other activators:            Fe³⁺ , Eu²⁺ , O^-₂ ,

Peaks in the spectrum (nm):

Eu²⁺ repl. Ca²⁺  : 440nm

Fe³⁺ repl. Al³⁺ : red band (band at 710 - 720nm?)

Mn²⁺ : broad band at 630 - 690nm ?

Comments on activators and spectra:

Activator: O^-₂ (Gorobets);

The emission spectrum is dependent upon excitation wavelength, indicating that S₂^- occupies several different sites.

Gaft reported that the relative efficiency of yellow luminescence from one scapolite sample was increased up to 117 times by heat treatment at 1000 °C for 2 h in air.

The enhancement of yellow luminescence by heat treatment was ascribed to the alteration of SO₃^2- and SO₄^2- to S₂^-  in scapolite.

Excitation by CW laser at 532 nm revealed several luminescence bands which may be supposedly connected to Mn²⁺ and Fe³⁺ centers (Gaft).

Best Locality for luminescence(*):

• Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada;
• Old Mill Site, Franklin, New jersey, USA (orange SW associated with amazonite);
• Skräbböle quarry, Pargas, Southwestern Finland Region, Finland (dim white-blue SW);
• Ahvensaari, Pargas, Southwestern Finland Region, Finland (red SW);
• Webster prospects, Sanford, York Co., Maine, USA (red SW);
• Otter Lake, Pontiac RCM, Outaouais, Québec, Canada (var. wernerite orange-yellow LW);
• Marble Quarry, Grand Forks, Greenwood Mining Division, British Columbia, Canada (strong orange SW);
• Six Hundred Meter Locality, Sanford, York Co., Maine, USA (microxls, dim orange SW);
• Passaic pit, Sterling Hill, Ogdensburg, Franklin Mining District, Sussex Co., New Jersey, USA (red SW);
• Lead Hill Mines, Ticonderoga, Ticonderoga Township, Essex Co., New York, USA (deep dark magenta-red SW);
• Hazen quarry, Haddam, Middlesex Co., Connecticut, USA (pink SW);

(*)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 ,
• 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 ,

Luminescence Reference on internet:

• The Picking Table (Journal of the Franklin-Ogdensburg Mineralogical Society), vol. 55, no. 2, p. 13-25
• MONT-SAINT-HILAIRE, History, Geology, Mineralogy, Laszlo HORVATH, The Canadian Mineralogist, Special Publication 14, 2019

 

Images:

 

• Webster prospects, Maine, USA: http://www.mindat.org/photo-51784.html
• wernerite, Otter Lake, Québec, Canada: http://www.mindat.org/photo-288191.html
• Six Hundred Meter Locality, Maine, USA: http://www.mindat.org/photo-445629.html
• Passaic pit, Sterling Hill, USA: http://www.mindat.org/photo-513787.html
• Lead Hill Mines, New York, USA: http://www.mindat.org/photo-573238.html
• Lead Hill Mines, New York, USA: http://www.mindat.org/photo-573240.html
• Hazen quarry,Connecticut, USA: http://www.mindat.org/photo-618488.html
• Pargas, Finland: http://www.mindat.org/photo-648117.html

Mineralogical Reference on internet:

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

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

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