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Takeuchiite Mineral Data
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General Takeuchiite Information
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 Chemical Formula: |
Mg2Mn+++O2(BO3) |
| Composition: |
Molecular Weight = 194.36 gm |
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Magnesium 25.01 % Mg 41.48 % MgO |
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Manganese 28.27 % Mn 40.61 % Mn2O3 |
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Boron 5.56 % B 17.91 % B2O3 |
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Oxygen 41.16 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
Mg2Mn3+O2(BO3) |
| Environment: |
In dolomite. |
| IMA Status: |
Approved IMA 1980 |
| Locality: |
Lanban, Varmland, Sweden. Link to MinDat.org Location Data. |
| Name Origin: |
Named for Yoshio Takeuchi (1924-), Japanese mineralogist |
| Name Pronunciation: |
Takeuchiite + Pronunciation  |
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Takeuchiite Image |
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Images:
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Takeuchiite Crystallography
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| Axial Ratios: |
a:b:c =2.1801:1:0.4793 |
| Cell Dimensions: |
a = 27.5, b = 12.614, c = 6.046, Z = 24; V = 2,097.27 Den(Calc)= 3.69 |
| Crystal System: |
Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Pnnm |
| X Ray Diffraction: |
By Intensity(I/Io): 1.511(1), 2.6(0.9), 5.2(0.85), |
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Physical Properties of Takeuchiite
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| Cleavage: |
None |
| Color: |
Black. |
| Density: |
3.93 |
| Diaphaneity: |
Opaque |
| Fracture: |
Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern. |
| Hardness: |
6 - Orthoclase |
| Luster: |
Metallic |
| Streak: |
brown |
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Optical Properties of Takeuchiite
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| Optical Data: |
NCalc= 1.9 - from Gladstone-Dale relationship (KC = 0.2437) where Ncalc=Dcalc*KC+1
NCalc= 1.96 - from Gladstone-Dale relationship (KC = 0.2437) where Ncalc=Dmeas*KC+1
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Calculated Properties of Takeuchiite
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| Electron Density: |
Bulk Density (Electron Density)=3.57 gm/cc
note: Specific Gravity of Takeuchiite =3.69 gm/cc.
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| Fermion Index: |
Fermion Index = 0.03
Boson Index = 0.97 |
| Photoelectric: |
PETakeuchiite = 7.85 barns/electron
U=PETakeuchiite x rElectron Density= 28.02 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Takeuchiite is Not Radioactive |
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Takeuchiite Classification
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| Dana Class: |
24.02.06.01 (24)Borates - Anhydrous |
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(24.02)where (A)2 BO2 [XO3] |
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(24.02.06)Dana Group |
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24.02.06.01 Takeuchiite Mg2MnO2(BO3) Pnnm 2/m 2/m 2/m |
| Strunz Class: |
06.AB.40 06 - BORATES |
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06.A - Monoborates |
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06.AB -BO3, with additional anions; 1(D) + OH, etc. |
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06.AB.40 Blatterite (Mn,Mg)35Sb3(Mn,Fe)9(BO3)16O32 Pnnm 2/m 2/m 2/m |
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06.AB.40 Chestermanite Mg2(Fe,Mg,Al,Sb)BO3O2 Pbam 2/m 2/m 2/m |
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06.AB.40 Orthopinakiolite (Mg,Mn)2MnBO5 Pnnm 2/m 2/m 2/m |
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06.AB.40 Takeuchiite Mg2MnO2(BO3) Pnnm 2/m 2/m 2/m |
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Other Takeuchiite Information
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| References: |
NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) |
| See Also: |
Links to other databases for Takeuchiite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - Scandinavian mineral gallery
16 - WWW-MINCRYST
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Print or Cut-and-Paste your Takeuchiite Specimen Label here :
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Takeuchiite
Mg2Mn+++O2(BO3)
Dana No: 24.02.06.01 Strunz No: 06.AB.40
Locality:
Notes:
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