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Takanelite Mineral Data

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General Takanelite Information

Help on Chemical  Formula: Chemical Formula: (Mn++,Ca)Mn++++4O8•(H2O)
Help on Composition: Composition: Molecular Weight = 419.21 gm
   Calcium     0.96 %  Ca    1.34 % CaO
   Manganese  64.21 %  Mn   15.23 % MnO / 82.95 % MnO2
   Hydrogen    0.48 %  H     4.30 % H2O
   Oxygen     34.35 %  O
             ______        ______ 
             100.00 %      103.82 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mn2+0.9Ca0.1Mn4+4O8•(H2O)
Help on Environment: Environment: Oxidation zone of a braunite-rhodochrosite-Carpopilite deposit.
Help on IMA Status: IMA Status: Approved IMA 1971
Help on Locality: Locality: Nomura mine, Ehime, Japan. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Katsutoshi Takane (1899-1945), professor of mineralogy, Tohoku University, Sendai, Japan.
Help on Name Pronunciation: Name Pronunciation: Takanelite + Pronunciation Say TAKANELITE
Help on Synonym: Synonym: Wad

Takanelite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:1.03686
Help on Cell Dimensions: Cell Dimensions: a = 8.68, c = 9, Z = 3; V = 587.24 Den(Calc)= 3.56
Help on Crystal System: Crystal System: Hexagonal Space Group: Unk
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 7.25(1), 3.619(0.25), 2.451(0.2),

Physical Properties of Takanelite

Help on Cleavage: Cleavage: None
Help on Color: Color: Brownish gray, Black, Steel gray.
Help on Density: Density: 3.41 - 3.425, Average = 3.41
Help on Diaphaneity: Diaphaneity: Opaque
Help on Habit: Habit: Inclusions - Generally found as inclusions in other minerals.
Help on Habit: Habit: Massive - Uniformly indistinguishable crystals forming large masses.
Help on Hardness: Hardness: 2.5-3 - Finger Nail-Calcite
Help on Luster: Luster: Sub Metallic
Help on Streak: Streak: brown black

Optical Properties of Takanelite

Help on Optical Data: Optical Data: NCalc= 2.33 - from Gladstone-Dale relationship (KC = 0.3742) where Ncalc=Dcalc*KC+1
NCalc= 2.28 - from Gladstone-Dale relationship (KC = 0.3742) where Ncalc=Dmeas*KC+1

Calculated Properties of Takanelite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.37 gm/cc
note: Specific Gravity of Takanelite =3.56 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0001785012
Boson Index = 0.9998214988
Help on Photoelectric: Photoelectric: PETakanelite = 16.91 barns/electron
U=PETakanelite x rElectron Density= 57.02 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Takanelite is Not Radioactive

Takanelite Classification

Help on  Dana Class: Dana Class: (07)Multiple Oxides
  (07.10)Dana Type
  (07.10.01)Dana Group Rancieite (Ca,Mn)Mn4O9•3(H2O) Unk Hex Takanelite (Mn,Ca)Mn4O8•(H2O) Unk Hex
Help on  Strunz Class: Strunz Class: 04.FL.40 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
  04.F - Hydroxides (without V or U)
  04.FL -Hydroxides with H2O � (OH); sheets of edge-sharing octahedra
04.FL.40 Takanelite (Mn,Ca)Mn4O8•(H2O) Unk Hex
04.FL.40 Rancieite (Ca,Mn)Mn4O9•3(H2O) Unk Hex

Other Takanelite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Takanelite :
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

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Dana No: Strunz No: 04.FL.40





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