Charmarite-3T Mineral Data

Charmarite-3T Mineral Data

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General Charmarite-3T 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:

IMA1992-027

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Charmarite-3T Crystallography

Axial Ratios:

a:c = 1:2.05942

Cell Dimensions:

a = 10.9885, c = 22.63, Z = 6; V = 2,366.42 Den(Calc)= 2.49

Crystal System:

Trigonal - TrapezohedralH-M Symbol (3 2) Space Group: P 3₁12

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

By Intensity(I/I_o): 7.55(1), 3.77(0.9), 2.67(0.7),

Physical Properties of Charmarite-3T

Color:

Orange brown, Pale brown, Pale blue, Colorless.

Density:

2.5

Diaphaniety:

Transparent

Habit:

Tabular - Form dimensions are thin in one direction.

Hardness:

2 - Gypsum

Luster:

Vitreous (Glassy)

Optical Properties of Charmarite-3T

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

Optical Data:

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

Calculated Properties of Charmarite-3T

Electron Density:

r_electron=2.47 gm/cc
note: r_{Charmarite-3T}=2.49 gm/cc.

Fermion Index

Fermion Index = 0.00046
Boson Index = 0.99954

Photoelectric:

PE_{Charmarite-3T}= 9.61 barns/electron
U=PE_{Charmarite-3T} x r_electron= 23.78 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Charmarite-3T is Not Radioactive

Charmarite-3T Classification

Dana Class:

16b.6.4.5 (16b)Carbonates - Hydroxyl or Halogen

(16b.6)Dana Type

(16b.6.4)Dana Group

16b.6.4.1 Quintinite-2H Mg4Al2(OH)12CO3·4(H2O) P 6₃22 6 2 2

16b.6.4.2 Quintinite-3T Mg4Al2(OH)12CO3·4(H2O) P 3₁12,P 3₂12 3 2

16b.6.4.3 Caresite Fe4Al2(OH)12CO3·3(H2O) P 3₁12 or P 3₂12 3 2

16b.6.4.4 Charmarite-2H Mn4Al2(CO3)(OH)12·3(H2O) P 6₃22 6 2 2

16b.6.4.5 Charmarite-3T Mn4Al2(CO3)(OH)12·3(H2O) P 3₁12 3 2

Strunz Class:

V/E.02-08* V - Nitrates, Carbonates and Borates

V/E - Water-bearing carbonates with unfamiliar anions

V/E.02 - Manasseite group

V/E.02-05 Quintinite-2H Mg4Al2(OH)12CO3·4(H2O) P 6₃22 6 2 2

V/E.02-05* Quintinite-3T Mg4Al2(OH)12CO3·4(H2O) P 3₁12,P 3₂12 3 2

V/E.02-07 Caresite Fe4Al2(OH)12CO3·3(H2O) P 3₁12 or P 3₂12 3 2

V/E.02-08 Charmarite-2H Mn4Al2(CO3)(OH)12·3(H2O) P 6₃22 6 2 2

V/E.02-08* Charmarite-3T Mn4Al2(CO3)(OH)12·3(H2O) P 3₁12 3 2

V/E.02-09 Zaccagnaite! Zn4Al2(OH)12(CO3)·3(H2O) P 6₃/mmc 6/m 2/m 2/m

V/E.02-10 Manasseite Mg6Al2(CO3)(OH)16·4(H2O) P 6₃/mmc 6/m 2/m 2/m

V/E.02-20 Chlormagaluminite (Mg,Fe)4Al2(OH)12(Cl2,CO3)·2(H2O) P 6/mcm, P 6cm, P 6c2 Hex

V/E.02-30 Barbertonite Mg6Cr2(CO3)(OH)16·4(H2O) P 6₃/mmc 6/m 2/m 2/m

V/E.02-40 Sjogrenite Mg6Fe2(CO3)(OH)14·5(H2O) P 6₃/mmc 6/m 2/m 2/m

Other Charmarite-3T Information

References:

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

See Also:

Links to other databases for Charmarite-3T :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -MinDAT 6 -MinMax(Deutsch) 7 -MinMax(English) 8 -Mineralienatlas (Deutsch) 9 -QUT Mineral Atlas

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Print or Cut-and-Paste your Charmarite-3T Specimen Label here :

Charmarite-3T

Mn++4Al2(CO3)(OH)12·3(H2O)
Dana No: 16b.6.4.5 Strunz No: V/E.02-08*
Locality:

Notes: