Takeuchiite Mineral Data

Takeuchiite Mineral Data
Search Webmineral :
   
Home Crystal jmol jPOWD Chem X Ray Dana Strunz Properties A to Z Images       News Help About


Lapis Mineral Journal

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

Click Here for Larger Takeuchiite Image in a New Browser Window Images:
Click Here for Larger Takeuchiite Image

Takeuchiite

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 - DipyramidalH-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),
Click Here for Large Takeuchiite Structure Window Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
 Help on Above


Norrestam R , Bovin J-O , Zeitschrift fur Kristallographie , 181 (1987) p.135-149, The crystal structure of takeuchiite, Mg1.71Mn1.29BO5:, A combined single crystal X-ray and HRTEM study, Locality: Langban mine, Sweden

 

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: 24.02.06.01 (24)Borates - Anhydrous
  (24.02)where (A)2 BO2 [XO3]
  (24.02.06)Dana Group
 
24.02.06.01 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
16 - WWW-MINCRYST

Search for Takeuchiite using:

Google
 
Web webmineral.com
[ALTAVISTA] [AOL] [bing] [GeoScienceWorld] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Takeuchiite :

B & L Fine Minerals

Dan Weinrich Fine Minerals

Dan Weinrich Auctions

Dakota Matrix

Excalibur Minerals

Exceptional Minerals

Fabre Minerals

John Betts Fine Minerals

Lapis Mineral Journal

Mineral News

UV Tools

Wrights Rock Shop

Translate Takeuchiite Mineral Data :

Ask about Takeuchiite 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 Espaņol

Print or Cut-and-Paste your Takeuchiite Specimen Label here :

Takeuchiite

Mg2Mn+++O2(BO3)
Dana No: 24.02.06.01 Strunz No: 06.AB.40
Locality:

 

Notes: