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Tapiolite-(Mn) Mineral Data

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General Tapiolite-(Mn) Information

Help on Chemical  Formula: Chemical Formula: (Mn++,Fe++)(Ta,Nb)2O6
Help on Composition: Composition: Molecular Weight = 482.71 gm
   Calcium     0.33 %  Ca    0.46 % CaO
   Tantalum   63.73 %  Ta   77.81 % Ta2O5
   Manganese   7.97 %  Mn   10.29 % MnO
   Niobium     5.77 %  Nb    8.26 % Nb2O5
   Iron        2.31 %  Fe    2.98 % FeO
   Oxygen     19.89 %  O
             ______        ______ 
             100.00 %       99.80 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mn2+0.7O6Fe2+0.2Ca0.04Ta1.7Nb0.3
Help on Environment: Environment: Accessory mineral in a lithium-rich pegmatite dike.
Help on IMA Status: IMA Status: Approved IMA 1983
Help on Locality: Locality: Viitaniemi pegmatite, Erajarvi area, Orivesi, Finland. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the MANGANese content and relationship to ferroTAPIOLITE.
Help on Name Pronunciation: Name Pronunciation: Tapiolite-(Mn) + Pronunciation Say TAPIOLITE-(MN)
Help on Synonym: Synonym: Manganotapiolite - Renamed to Tapiolite-(Mn) by Mineralogical Record, v39 (2008), p 131
 

Tapiolite-(Mn) Image

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  Tapiolite-(Mn)   Tapiolite

Comments: Black opaque resinous massive manganotapiolite.
Location: Skogbole Mine, Kimito, Turku ja Pori, Finland. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Tapiolite-(Mn) Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:1.94708
Help on Cell Dimensions: Cell Dimensions: a = 4.762, c = 9.272, Z = 2; V = 210.26 Den(Calc)= 7.62
Help on Crystal System: Crystal System: Tetragonal - Ditetragonal Dipyramidal H-M Symbol (4/m 2/m 2/m) Space Group: P 41/mnm
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.367(1), 1.754(0.9), 2.592(0.9),
 

Physical Properties of Tapiolite-(Mn)

Help on Cleavage: Cleavage: None
Help on Color: Color: Dark brown, Black brown.
Help on Density: Density: 7.72
Help on Diaphaneity: Diaphaneity: Translucent to Opaque
Help on Habit: Habit: Massive - Uniformly indistinguishable crystals forming large masses.
Help on Hardness: Hardness: 6 - Orthoclase
Help on Luster: Luster: Sub Metallic
Help on Streak: Streak: dark brown
 

Optical Properties of Tapiolite-(Mn)

Help on Dichroism (e): Dichroism (e): yellowish brown.
Help on Dichroism (w): Dichroism (w): reddish brown.
Help on Optical Data: Optical Data: Uniaxial (?).
  NCalc= 2.27 - from Gladstone-Dale relationship (KC = 0.1665) where Ncalc=Dcalc*KC+1
NCalc= 2.29 - from Gladstone-Dale relationship (KC = 0.1665) where Ncalc=Dmeas*KC+1
Help on RL Bireflectance: RL Bireflectance: Weak, light brownish gray to gray.
Help on RL Color: RL Color: Gray with strong red-brown internal reflections.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Tapiolite-(Mn) in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 470 nm   16.00   15.70 
   
 546 nm   14.70   14.10 
 589 nm   15.00   14.80 
 650 nm   15.10   14.60 
Calculated Relative Intensity Colors of Tapiolite-(Mn) in Air
Relative
Intensity
   0%   70% 100% 140% 210% 280% 350% 420% 490% 560% 610%
R1                      
R2                      
 

Calculated Properties of Tapiolite-(Mn)

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=6.56 gm/cc
note: Specific Gravity of Tapiolite-(Mn) =7.62 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0006669592
Boson Index = 0.9993330408
Help on Photoelectric: Photoelectric: PETapiolite-(Mn) = 774.42 barns/electron
U=PETapiolite-(Mn) x rElectron Density=5,083.12 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Tapiolite-(Mn) is Not Radioactive
 

Tapiolite-(Mn) Classification

Help on  Dana Class: Dana Class: 08.03.01.02 (08)Multiple Oxides with Nb, Ta, and Ti
  (08.03)where A (B2O6)
  (08.03.01)Tapiolite Series
 
08.03.01.00 Tapiolite* (Fe,Mn)(Ta,Nb)2O6 P 41/mnm 4/m 2/m 2/m
 
08.03.01.01 Tapiolite-(Fe) (Fe,Mn)(Ta,Nb)2O6 P 41/mnm 4/m 2/m 2/m
 
08.03.01.02 Tapiolite-(Mn) (Mn,Fe)(Ta,Nb)2O6 P 41/mnm 4/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 04.DB.10 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
  04.D - Metal:Oxygen = 1:2 and similar
  04.DB -With medium-sized cations; chains of edge-sharing octahedra
 
04.DB.10 Bystromite MgSb2O6 P 41/mnm 4/m 2/m 2/m
 
04.DB.10 Tapiolite-(Fe) (Fe,Mn)(Ta,Nb)2O6 P 41/mnm 4/m 2/m 2/m
 
04.DB.10 Ordonezite ZnSb2O6 P 41/mnm 4/m 2/m 2/m
 
04.DB.10 Tapiolite-(Mn) (Mn,Fe)(Ta,Nb)2O6 P 41/mnm 4/m 2/m 2/m
 
04.DB.10 Tapiolite* (Fe,Mn)(Ta,Nb)2O6 P 41/mnm 4/m 2/m 2/m
 

Other Tapiolite-(Mn) Information

Help on References: References: NAME( AntBidBlaNic3) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic3)
Help on See Also: See Also: Links to other databases for Tapiolite-(Mn) :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Tapiolite-(Mn)

(Mn++,Fe++)(Ta,Nb)2O6
Dana No: 08.03.01.02 Strunz No: 04.DB.10
Locality:

 

Notes:

 

 
   
 


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