Mineralogy Database

Tantite Mineral Data

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General Tantite Information

Help on Chemical  Formula: Chemical Formula: Ta2O5
Help on Composition: Composition: Molecular Weight = 441.89 gm
   Tantalum  81.90 %  Ta  100.00 % Ta2O5
   Oxygen    18.10 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ta2O5
Help on Environment: Environment: Granitic pegmatites.
Help on IMA Status: IMA Status: Approved IMA 1983
Help on Locality: Locality: Kola region, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for its composition (Tantalum).
Help on Name Pronunciation: Name Pronunciation: Tantite Say TANTITE
 

Tantite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.0026:1:9.43
Help on Cell Dimensions: Cell Dimensions: a = 3.8, b = 3.79, c = 35.74, Z = 6; alpha = 90.92°, beta = 90.18°, gamma = 90° V = 514.66 Den(Calc)= 8.55
Help on Crystal System: Crystal System: Triclinic - Pedial H-M Symbol (1) Space Group: P1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.01(1), 1.844(0.9), 1.573(0.8),
 

Physical Properties of Tantite

Help on Cleavage: Cleavage: None
Help on Color: Color: Colorless.
Help on Density: Density: 8.45
Help on Diaphaneity: Diaphaneity: Transparent
Help on Habit: Habit: Microscopic Crystals - Crystals visible only with microscopes.
Help on Hardness: Hardness: 7 - Quartz
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Adamantine
Help on Streak: Streak: white
 

Optical Properties of Tantite

Help on Optical Data: Optical Data: Biaxial (?)
  NCalc= 2.29 - from Gladstone-Dale relationship (KC = 0.151) where Ncalc=Dcalc*KC+1
NCalc= 2.28 - from Gladstone-Dale relationship (KC = 0.151) where Ncalc=Dmeas*KC+1
Help on RL Anisotrophism: RL Anisotrophism: Observed.
Help on RL Color: RL Color: Grayish white.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Tantite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 486 nm   17.50   16.50 
   
 551 nm   17.20   15.40 
 589 nm   17.10   15.30 
 656 nm   15.40   14.20 
Calculated Relative Intensity Colors of Tantite in Air
Relative
Intensity
   0%   60% 100% 120% 180% 240% 300% 360% 420% 480% 540% 590%
R1                        
R2                        
 

Calculated Properties of Tantite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=7.20 gm/cc
note: Specific Gravity of Tantite =8.55 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0001851717
Boson Index = 0.9998148283
Help on Photoelectric: Photoelectric: PETantite =1,001.81 barns/electron
U=PETantite x rElectron Density=7,210.67 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Tantite is Not Radioactive
 

Tantite Classification

Help on  Dana Class: Dana Class: 04.06.06.01 (04)Simple Oxides
  (04.06)not classified
  (04.06.06)Dana Group
 
04.06.06.01 Tantite Ta2O5 P1 1
Help on  Strunz Class: Strunz Class: 04.EA.05 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
  04.E - Metal:Oxygen = < 1:2
  04.EA -Oxides with metal : oxygen < 1:2 (M2O5, MO3)
 
04.EA.05 Tantite Ta2O5 P1 1
 

Other Tantite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(AntBidBlaNic3)
Help on See Also: See Also: Links to other databases for Tantite :
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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Print or Cut-and-Paste your Tantite Specimen Label here :

Tantite

Ta2O5
Dana No: 04.06.06.01 Strunz No: 04.EA.05
Locality:

 

Notes:

 

 
   
 


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