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Charmarite-3T

Formula:
Mn
2+
4
Al
 
2
(CO
 
3
)(OH)
 
12
·3H
 
2
O
Lustre:VitreousHardness:2
Name:Named for Charles (1917-2003) and Marcelle (1918-2003) Weber, amateur mineralogists of Guilford, CT, who contributed extensively to the knowledge of Mt. St.-Hilaire and also found the mineral.
A polytype of Charmarite

The 3T polytype was originally described from Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry), Mont Saint-Hilaire, Rouville Co., Québec, Canada.

Classification of Charmarite-3T

Explanation of status:In 1998 the IMA pronounced that polytypes were crystallographic varieties
Strunz 9th edition ID:5.DA.40

5 : CARBONATES (+ NITRATES)
D : Carbonates with additional anions, with H2O
A : With medium-sized cations
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Physical Properties of Charmarite-3T

Lustre:Vitreous
Hardness (Mohs):2

Chemical Properties of Charmarite-3T

Formula:
Mn
2+
4
Al
 
2
(CO
 
3
)(OH)
 
12
·3H
 
2
O
Essential elements:Al, C, H, Mn, O
All elements listed in formula:Al, C, H, Mn, O

Other Names for Charmarite-3T

Synonyms:
IMA1992-027
Other Languages:

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Charmarite-3T

Reference List:Canadian Mineralogist: 35: 1541-1549.

Internet Links for Charmarite-3T

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    Localities for Charmarite-3T

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    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Canada
     
    • Québec
      • Montérégie
        • Rouville RCM
          • Mont Saint-Hilaire
    		Chao, G.Y., Gault, R.A. (1997), Quintinite-2H, quintinite-3T, charmarite-2H, charmarite-3T, and caresite-3T, a new group of carbonate minerals related to the hydrotalcite-manasseite group. Canadian Mineralogist: 35: 1541-1549; American Mineralogist: 83: 1347.
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    Copyright © Jolyon Ralph and Ida Chau 1993-2009. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 19th Nov 2009 10:03:45