Alumotantite Mineral Data

Alumotantite Mineral Data
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General Alumotantite Information

Help on Chemical Formula: Chemical Formula: AlTaO4
Help on Composition: Composition: Molecular Weight = 271.93 gm
   Tantalum  66.54 %  Ta   81.25 % Ta2O5
   Aluminum   9.92 %  Al   18.75 % Al2O3
   Oxygen    23.53 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: AlTaO4
Help on Environment: Environment: In albitized areas of highly fractionated rare element-enriched granite pegmatites.
Help on IMA Status: IMA Status: Approved IMA 1981
Help on Locality: Locality: From an undisclosed locality [Leshaia pegmatite, Vuoiyarvi carbonatite complex] on the Kola Peninsula, Russia. In the Mdara mine, Bikita, Zimbabwe. From the Alta fo Giz pegmatite, near Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: For ALUMinum and TANTalum in the composition.
Help on Name Pronunciation: Name Pronunciation: Alumotantite + Pronunciation Say ALUMOTANTITE
Help on Synonym: Synonym: ICSD 67676
  PDF 47-1796
 

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Alumotantite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =0.3955:1:0.4222
Help on Cell Dimensions: Cell Dimensions: a = 4.473, b = 11.308, c = 4.775, Z = 4; V = 241.52 Den(Calc)= 7.48
Help on Crystal System: Crystal System: Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: P bcn
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.13(1), 2.88(0.6), 3.64(0.5),
Click Here for Large Alumotantite Structure Window Crystal Structure:

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Ercit T S , Hawthorne F C , Cerny P , The Canadian Mineralogist , 30 (1992) p.653-662, The crystal structure of alumotantite: Its relation to, the structures of simpsonite and the (Al,Ga)(Ta,Nb)O4 compounds

 

Physical Properties of Alumotantite

Help on Cleavage: Cleavage: None
Help on Color: Color: Colorless, White.
Help on Diaphaneity: Diaphaneity: Transparent
Help on Hardness: Hardness: 7.5 - Garnet
Help on Luster: Luster: Adamantine
Help on Streak: Streak: white
 

Optical Properties of Alumotantite

Help on Gladstone-Dale: Gladstone-Dale: CI calc= 0.172 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1337,KC= 0.1615
Ncalc = 2.21
Help on Optical Data: Optical Data: Biaxial (-), a=2, b=2, g=2, bire=0.0000, 2V(Calc)=0, 2V(Meas)=66.
Help on RL Anisotrophism: RL Anisotrophism: Observed.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Alumotantite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 486 nm   15.60   14.70 
   
 589 nm   15.40   14.60 
 656 nm   15.90   15.10 
Calculated Relative Intensity Colors of Alumotantite in Air
Relative
Intensity		    0%   60% 100% 120% 180% 240% 300% 360% 420% 480% 540% 600%
R1                        
R2                        
 

Calculated Properties of Alumotantite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=6.49 gm/cc
note: Specific Gravity of Alumotantite =7.48 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0001928186
Boson Index = 0.9998071814
Help on Photoelectric: Photoelectric: PEAlumotantite = 789.89 barns/electron
U=PEAlumotantite x rElectron Density=5,127.74 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Alumotantite is Not Radioactive
 

Alumotantite Classification
Help on Dana Class: Dana Class: 08.01.07.01 (08)Multiple Oxides with Nb, Ta, and Ti
  (08.01)where A BO4
  (08.01.07)Dana Group
 
08.01.07.01 Alumotantite AlTaO4 P bcn 2/m 2/m 2/m
Help on Strunz Class: Strunz Class: 04.DB.55 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.55 Alumotantite AlTaO4 P bcn 2/m 2/m 2/m
 

Other Alumotantite 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 Alumotantite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (MinSocAm)
8 - MinDAT
9 - MinMax(Deutsch)
10 - MinMax(English)
11 - Mineralienatlas (Deutsch)
12 - QUT Mineral Atlas
13 - Ruff.Info
14 - WWW-MINCRYST

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Alumotantite

AlTaO4
Dana No: 08.01.07.01 Strunz No: 04.DB.55
Locality:

 

Notes: