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Charmarite-3T

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About Charmarite-3THide

Formula:
Mn2+4Al2(CO3)(OH)12 · 3H2O
Lustre:
Vitreous
Hardness:
2
Specific Gravity:
2.48
Crystal System:
Trigonal
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-3THide

5.00.

5 : CARBONATES (NITRATES)
0 :
0 :

Physical Properties of Charmarite-3THide

Vitreous
Hardness:
Density:
2.48(1) g/cm3 (Measured)    2.50 g/cm3 (Calculated)

Optical Data of Charmarite-3THide

Type:
Uniaxial (-)
Comments:
epsilon not measured

Chemical Properties of Charmarite-3THide

Formula:
Mn2+4Al2(CO3)(OH)12 · 3H2O

Crystallography of Charmarite-3THide

Crystal System:
Trigonal
Cell Parameters:
a = 10.985(3) Å, c = 22.63(3) Å
Ratio:
a:c = 1 : 2.06
Unit Cell V:
2,364.91 ų (Calculated from Unit Cell)
Z:
6
Comment:
P312 or P32l2

Synonyms of Charmarite-3THide

Related Minerals - Nickel-Strunz GroupingHide

5.00.Charmarite-2HMn2+4Al2(CO3)(OH)12 · 3H2OHex.

Other InformationHide

Health Risks:
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-3THide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
CHAO, G.Y., and 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.

Internet Links for Charmarite-3THide

Localities for Charmarite-3THide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Canada
 
  • Québec
    • Montérégie
      • La Vallée-du-Richelieu 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.
 
Mineral and/or Locality  
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