Charmarite-2H Mineral Data

General Charmarite-2H Information

Chemical Formula:

Mn++4Al2(CO3)(OH)12•3(H2O)

Composition:

Molecular Weight = 591.86 gm

Manganese 37.13 % Mn 47.94 % MnO

Aluminum 9.12 % Al 17.23 % Al₂O₃

Hydrogen 3.07 % H 27.39 % H₂O

Carbon 2.03 % C 7.44 % CO₂

Oxygen 48.66 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Mn²⁺₄Al₂(CO₃)(OH)₁₂•3(H₂O)

Environment:

In silicate and carbonate cavities and in pegmatites in nepheline syenite. The Mn-dominant analogue of caresite and quintinite.

IMA Status:

Approved IMA 1995

Locality:

Mt. St.-Hilaire, QUE, Canada. Link to MinDat.org Location Data.

Name Origin:

Named for Charles (1917-) and Marcelle (1918-) Weber, amateur mineralogist of Guilford, CT, who contributed extensively to the knowledge of Mt. St.-Hilaire and also found the minera l.

Synonym:

IMA1992-026

Search for Charmarite-2H Images

Images:

Image not yet available on Webmineral.com

Try searching images.google.com or Mindat Picture Gallary for mineral pictures. Caution: The images retrieved may not be appropriate.

Charmarite-2H Crystallography

Axial Ratios:

a:c = 1:1.3746

Cell Dimensions:

a = 10.985, c = 15.1, Z = 4; V = 1,578.00 Den(Calc)= 2.49

Crystal System:

Hexagonal - TrapezohedralH-M Symbol (6 2 2) Space Group: P 6₃22

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 7.53(1), 3.768(0.6), 2.578(0.5),

Physical Properties of Charmarite-2H

Color:

Orange brown, Pale brown, Pale blue, Colorless.

Density:

2.5

Diaphaneity:

Transparent

Habit:

Tabular - Form dimensions are thin in one direction.

Hardness:

2.5 - Finger Nail

Luster:

Vitreous (Glassy)

Optical Properties of Charmarite-2H

Gladstone-Dale:

CI meas= 0.051 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.047 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2277,KPDmeas= 0.2268,KC= 0.2389
Ncalc = 1.59 - 1.6

Optical Data:

Uniaxial (-), e=1.547, w=1.587, bire=0.0400.

Calculated Properties of Charmarite-2H

Electron Density:

Bulk Density (Electron Density)=2.47 gm/cc
note: Specific Gravity of Charmarite-2H =2.49 gm/cc.

Fermion Index:

Fermion Index = 0.0004613895
Boson Index = 0.9995386105

Photoelectric:

PE_{Charmarite-2H}= 9.61 barns/electron
U=PE_{Charmarite-2H} x rElectron Density= 23.78 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Charmarite-2H is Not Radioactive

Charmarite-2H Classification

Dana Class:

16b.06.04.04 (16b)Carbonates - Hydroxyl or Halogen

(16b.06)Dana Type

(16b.06.04)Quintinite - Charmarite Group

16b.06.04.01 Quintinite-2H Mg4Al2(OH)12CO3•4(H2O) P 6₃22 6 2 2

16b.06.04.02 Quintinite-3T Mg4Al2(OH)12CO3•4(H2O) P 3₁12,P 3₂12 3 2

16b.06.04.03 Caresite Fe4Al2(OH)12CO3•3(H2O) P 3₁12 or P 3₂12 3 2

16b.06.04.04 Charmarite-2H Mn4Al2(CO3)(OH)12•3(H2O) P 6₃22 6 2 2

16b.06.04.05 Charmarite-3T Mn4Al2(CO3)(OH)12•3(H2O) P 3₁12 3 2

Strunz Class:

05.DA.40 05 - CARBONATES (NITRATES)

05.D - Carbonates with Additional Anions, with H2O

05.DA -With medium-sized cations

05.DA.40 Charmarite-3T Mn4Al2(CO3)(OH)12•3(H2O) P 3₁12 3 2

05.DA.40 Charmarite-2H Mn4Al2(CO3)(OH)12•3(H2O) P 6₃22 6 2 2

05.DA.40 Caresite Fe4Al2(OH)12CO3•3(H2O) P 3₁12 or P 3₂12 3 2

05.DA.40 Quintinite-2H Mg4Al2(OH)12CO3•4(H2O) P 6₃22 6 2 2

05.DA.40 Quintinite-3T Mg4Al2(OH)12CO3•4(H2O) P 3₁12,P 3₂12 3 2

Other Charmarite-2H Information

References:

NAME( Dana8) PHYS. PROP.(Am.Min.,Vol.83,p1347,1998) OPTIC PROP.(Dana8)

See Also:

Links to other databases for Charmarite-2H :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

Search for Charmarite-2H using:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Charmarite-2H :

A Bijoux Google Search for Charmarite-2H
Adam's Minerals Google Search for Charmarite-2H
Cape Minerals Google Search for Charmarite-2H
Dakota Matrix Minerals Google Search for Charmarite-2H
Excalibur Mineral Corp. Google Search for Charmarite-2H
Exceptional Minerals Google Search for Charmarite-2H
John Betts Fine Minerals Search for Charmarite-2H
McDougall Minerals Google Search for Charmarite-2H
Mineral News Website Link
Rock and Mineral Shows Google Search for Charmarite-2H
Weinrich Minerals, Inc. Google Search for Charmarite-2H

Ask about Charmarite-2H here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

Print or Cut-and-Paste your Charmarite-2H Specimen Label here :

Charmarite-2H

Mn++4Al2(CO3)(OH)12•3(H2O)
Dana No: 16b.06.04.04 Strunz No: 05.DA.40
Locality:

Notes: