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Takeuchiite Mineral Data + |
General Takeuchiite Information |
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| Mg2Mn+++O2(BO3) | |||
| 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 | |||
| Mg2Mn3+O2(BO3) | |||
| In dolomite. | |||
| Approved IMA 1980 | |||
| Lanban, Varmland, Sweden. Link to MinDat.org Location Data. | |||
| Named for Yoshio Takeuchi (1924-), Japanese mineralogist | |||
Takeuchiite Image | |||
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Takeuchiite Crystallography |
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| a:b:c =2.1801:1:0.4793 | |||
| a = 27.5, b = 12.614, c = 6.046, Z = 24; V = 2,097.27 Den(Calc)= 3.69 | |||
| Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Pnnm | |||
| By Intensity(I/Io): 1.511(1), 2.6(0.9), 5.2(0.85), | |||
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Mouse |
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Physical Properties of Takeuchiite |
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| None | |||
| Black. | |||
| 3.93 | |||
| Opaque | |||
| Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern. | |||
| 6 - Orthoclase | |||
| Metallic | |||
| brown | |||
Optical Properties of Takeuchiite |
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| 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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relectron=3.57 gm/cc |
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| Fermion Index = 0.03627 Boson Index = 0.96373 |
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PETakeuchiite = 7.85 barns/electron |
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| GRapi = 0 (Gamma Ray American Petroleum Institute Units) Takeuchiite is Not Radioactive |
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Takeuchiite Classification |
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| 24.2.6.1 (24)Borates - Anhydrous | |||
| (24.2)where (A)2 BO2 [XO3] | |||
| (24.2.6)Dana Group | |||
| V/G.04-70 V - Nitrates, Carbonates and Borates | |||
| V/G - "Insel" borates [BO3]3- "inseln" | |||
| V/G.04 - Ludwigite group | |||
Other Takeuchiite Information |
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| NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) | |||
| Links to other databases for Takeuchiite : 1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 - Scandinavian mineral gallery 13 - WWW-MINCRYST 14 -École des Mines de Paris Search for Takeuchiite using: Visit our Advertisers for Takeuchiite : Translate Takeuchiite Mineral Data : Ask about Takeuchiite here : Print or Cut-and-Paste your Takeuchiite Specimen Label here :
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