Heftetjernite Mineral Data

General Heftetjernite Information

Chemical Formula:

ScTaO4

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

Empirical Formula:

ScTaO₄

Environment:

Wolframite group

IMA Status:

Proposed IMA 2006 (Dana # Added)

Locality:

Heftetjern pegmatite, Tørdal, 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

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 - PrismaticH-M Symbol (2/m) Space Group: P 2/c

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 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

Optical Data:

NCalc= 2.24 - from Gladstone-Dale relationship (KC = 0.1762) where Ncalc=Dcalc*KC+1

Calculated Properties of Heftetjernite

Electron Density:

Bulk Density (Electron Density)=6.11 gm/cc
note: Specific Gravity of Heftetjernite =7.03 gm/cc.

Fermion Index:

Fermion Index = 0.0001808635
Boson Index = 0.9998191365

Photoelectric:

PE_{Heftetjernite}= 741.87 barns/electron
U=PE_{Heftetjernite} x rElectron Density=4,533.49 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Heftetjernite is Not Radioactive

Heftetjernite Classification

Dana Class:

48.01.01.04 (48)Anhydrous Molybdates and Tungstates

(48.01)where A XO4

(48.01.01)Wolframite series

48.01.01.00 Wolframite* (Fe,Mn)WO4 P 2/c 2/m

48.01.01.01 Hubnerite MnWO4 P 2/c 2/m

48.01.01.02 Ferberite FeWO4 P 2/c 2/m

48.01.01.03 Sanmartinite (Zn,Fe)WO4 P 2/c 2/m

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

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

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 :

Heftetjernite

ScTaO4
Dana No: 48.01.01.04 Strunz No: 04.DB.30
Locality:

Notes: