Database of luminescent minerals 

MAKATITE

Chemical formula: Na₂Si₄O₈(OH)₂ 4H₂O

Family: Silicates

Status: IMA-A

Crystal system : Monoclinic

Display mineral: NON

Luminescence:

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

Comments:

In Mt-St-Hilaire, Pectolite could be confused with Makatite. The major distinguishing feature is the fluorescence. While not all makatite fluoreseces, when it does it is moderate to strong blueish white or very pale greenish SW (and sometimes LW as well). This specimen fluoresces a weak pinkish LW – typical of MSH pectolite. (see http://www.mindat.org/photo-449516.html in bibliography).

Activator(s) and spectrum:

No spectrum yet

Best localities for fluorescence (*):

• Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada ;
• Demix-Varennes quarry, Saint-Amable sill, Varennes & St-Amable, Lajemmerais RCM, Montérégie, Québec, Canada (weak to moderate whitish SW and LW);

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

Bibliographic reference for luminescence:

Reference for luminescence on the Internet:

Mineralogical reference on the Internet:

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

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

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