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Heftetjernite Mineral Data
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General Heftetjernite Information
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 Chemical Formula: |
ScTaO4 |
| Composition: |
Molecular Weight = 289.90 gm |
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Scandium 15.51 % Sc 23.79 % Sc2O3 |
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Tantalum 62.42 % Ta 76.21 % Ta2O5 |
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Oxygen 22.08 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
ScTaO4 |
| Environment: |
Wolframite group |
| IMA Status: |
Proposed IMA 2006 (Dana # Added) |
| Locality: |
Heftetjern pegmatite, T�rdal, Drangedal, Telemark, Norway Link to MinDat.org Location Data. |
| Name Origin: |
Commission on New Minerals, Nomenclature and Classification (CNMNC) |
| Synonym: |
IMA2006-056 |
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Heftetjernite Crystallography
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| Axial Ratios: |
a:b:c =0.8553:1:0.9154 |
| Cell Dimensions: |
a = 4.784, b = 5.593, c = 5.12, Z = 2; beta = 91.15° V = 136.97 Den(Calc)= 7.03 |
| Crystal System: |
Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 2/c |
| 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), |
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Optical Properties of Heftetjernite
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| Optical Data: |
NCalc= 2.24 - from Gladstone-Dale relationship (KC = 0.1762) where Ncalc=Dcalc*KC+1
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Calculated Properties of Heftetjernite
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| Electron Density: |
Bulk Density (Electron Density)=6.11 gm/cc
note: Specific Gravity of Heftetjernite =7.03 gm/cc.
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| Fermion Index: |
Fermion Index = 0.0001808635
Boson Index = 0.9998191365 |
| Photoelectric: |
PEHeftetjernite = 741.87 barns/electron
U=PEHeftetjernite x rElectron Density=4,533.49 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Heftetjernite is Not Radioactive |
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Heftetjernite Classification
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| Dana Class: |
48.01.01.04 (48)Anhydrous Molybdates and Tungstates |
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(48.01)where A XO4 |
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(48.01.01)Wolframite series |
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48.01.01.00 Wolframite* (Fe,Mn)WO4 P 2/c 2/m |
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48.01.01.01 Hubnerite MnWO4 P 2/c 2/m |
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48.01.01.02 Ferberite FeWO4 P 2/c 2/m |
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48.01.01.03 Sanmartinite (Zn,Fe)WO4 P 2/c 2/m |
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48.01.01.04 Heftetjernite! ScTaO4 P 2/c 2/m |
| Strunz Class: |
04.DB.30 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate |
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04.D - Metal:Oxygen = 1:2 and similar |
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04.DB -With medium-sized cations; chains of edge-sharing octahedra |
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04.DB.30 Ferberite FeWO4 P 2/c 2/m |
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04.DB.30 Hubnerite MnWO4 P 2/c 2/m |
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04.DB.30 Krasnoselskite* CoWO4 P 2/c 2/m |
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04.DB.30 Sanmartinite (Zn,Fe)WO4 P 2/c 2/m |
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04.DB.30 Wolframoixiolite* (Fe,Mn,Nb)(Nb,W,Ta)O4 Pc m |
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04.DB.30 Wolframite* (Fe,Mn)WO4 P 2/c 2/m |
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04.DB.30 Heftetjernite! ScTaO4 P 2/c 2/m |
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Other Heftetjernite Information
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| 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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Print or Cut-and-Paste your Heftetjernite Specimen Label here :
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Heftetjernite
ScTaO4
Dana No: 48.01.01.04 Strunz No: 04.DB.30
Locality:
Notes:
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