Mineralogy Database

Heftetjernite Mineral Data

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General Heftetjernite Information

Help on Chemical  Formula: Chemical Formula: ScTaO4
Help on Composition: Composition: Molecular Weight = 289.90 gm
   Scandium  15.51 %  Sc   23.79 % Sc2O3
   Tantalum  62.42 %  Ta   76.21 % Ta2O5
   Oxygen    22.08 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: ScTaO4
Help on Environment: Environment: Wolframite group
Help on IMA Status: IMA Status: Proposed IMA 2006 (Dana # Added)
Help on Locality: Locality: Heftetjern pegmatite, T�rdal, Drangedal, Telemark, Norway Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Commission on New Minerals, Nomenclature and Classification (CNMNC)
Help on Synonym: Synonym: IMA2006-056

Heftetjernite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.8553:1:0.9154
Help on Cell Dimensions: Cell Dimensions: a = 4.784, b = 5.593, c = 5.12, Z = 2; beta = 91.15° V = 136.97 Den(Calc)= 7.03
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 2/c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3(1), 2.957(0.97), 3.662(0.53),2.4877(0.34), 4.783(0.33), 3.807(0.32), 1.7639(0.27), 1.7157(0.22),

Optical Properties of Heftetjernite

Help on Optical Data: Optical Data: NCalc= 2.24 - from Gladstone-Dale relationship (KC = 0.1762) where Ncalc=Dcalc*KC+1

Calculated Properties of Heftetjernite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=6.11 gm/cc
note: Specific Gravity of Heftetjernite =7.03 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0001808635
Boson Index = 0.9998191365
Help on Photoelectric: Photoelectric: PEHeftetjernite = 741.87 barns/electron
U=PEHeftetjernite x rElectron Density=4,533.49 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Heftetjernite is Not Radioactive

Heftetjernite Classification

Help on  Dana Class: Dana Class: (48)Anhydrous Molybdates and Tungstates
  (48.01)where A XO4
  (48.01.01)Wolframite series Wolframite* (Fe,Mn)WO4 P 2/c 2/m Hubnerite MnWO4 P 2/c 2/m Ferberite FeWO4 P 2/c 2/m Sanmartinite (Zn,Fe)WO4 P 2/c 2/m Heftetjernite! ScTaO4 P 2/c 2/m
Help on  Strunz Class: Strunz Class: 04.DB.30 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.30 Ferberite FeWO4 P 2/c 2/m
04.DB.30 Hubnerite MnWO4 P 2/c 2/m
04.DB.30 Krasnoselskite* CoWO4 P 2/c 2/m
04.DB.30 Sanmartinite (Zn,Fe)WO4 P 2/c 2/m
04.DB.30 Wolframoixiolite* (Fe,Mn,Nb)(Nb,W,Ta)O4 Pc m
04.DB.30 Wolframite* (Fe,Mn)WO4 P 2/c 2/m
04.DB.30 Heftetjernite! ScTaO4 P 2/c 2/m

Other Heftetjernite Information

Help on See Also: See Also: Links to other databases for Heftetjernite :
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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Dana No: Strunz No: 04.DB.30





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