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Takeuchiite Mineral Data

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General Takeuchiite Information

Help on Chemical  Formula: Chemical Formula: Mg2Mn+++O2(BO3)
Help on Composition: Composition: Molecular Weight = 194.36 gm
   Magnesium  25.01 %  Mg   41.48 % MgO
   Manganese  28.27 %  Mn   40.61 % Mn2O3
   Boron       5.56 %  B    17.91 % B2O3
   Oxygen     41.16 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mg2Mn3+O2(BO3)
Help on Environment: Environment: In dolomite.
Help on IMA Status: IMA Status: Approved IMA 1980
Help on Locality: Locality: Lanban, Varmland, Sweden. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Yoshio Takeuchi (1924-), Japanese mineralogist
Help on Name Pronunciation: Name Pronunciation: Takeuchiite + Pronunciation Say TAKEUCHIITE

Takeuchiite Image

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Comments: Aggregates of black prismatic takeuchiite crystals.
Location: Langban, Varmland, Sweden. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Takeuchiite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =2.1801:1:0.4793
Help on Cell Dimensions: Cell Dimensions: a = 27.5, b = 12.614, c = 6.046, Z = 24; V = 2,097.27 Den(Calc)= 3.69
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Pnnm
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 1.511(1), 2.6(0.9), 5.2(0.85),

Physical Properties of Takeuchiite

Help on Cleavage: Cleavage: None
Help on Color: Color: Black.
Help on Density: Density: 3.93
Help on Diaphaneity: Diaphaneity: Opaque
Help on Fracture: Fracture: Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Help on Hardness: Hardness: 6 - Orthoclase
Help on Luster: Luster: Metallic
Help on Streak: Streak: brown

Optical Properties of Takeuchiite

Help on Optical Data: 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

Calculated Properties of Takeuchiite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.57 gm/cc
note: Specific Gravity of Takeuchiite =3.69 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.03
Boson Index = 0.97
Help on Photoelectric: Photoelectric: PETakeuchiite = 7.85 barns/electron
U=PETakeuchiite x rElectron Density= 28.02 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Takeuchiite is Not Radioactive

Takeuchiite Classification

Help on  Dana Class: Dana Class: (24)Borates - Anhydrous
  (24.02)where (A)2 BO2 [XO3]
  (24.02.06)Dana Group Takeuchiite Mg2MnO2(BO3) Pnnm 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 06.AB.40 06 - BORATES
  06.A - Monoborates
  06.AB -BO3, with additional anions; 1(D) + OH, etc.
06.AB.40 Blatterite (Mn,Mg)35Sb3(Mn,Fe)9(BO3)16O32 Pnnm 2/m 2/m 2/m
06.AB.40 Chestermanite Mg2(Fe,Mg,Al,Sb)BO3O2 Pbam 2/m 2/m 2/m
06.AB.40 Orthopinakiolite (Mg,Mn)2MnBO5 Pnnm 2/m 2/m 2/m
06.AB.40 Takeuchiite Mg2MnO2(BO3) Pnnm 2/m 2/m 2/m

Other Takeuchiite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: 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

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Dana No: Strunz No: 06.AB.40





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