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Scandian Ixiolite (of Bergstøl & Juve)

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About Scandian Ixiolite (of Bergstøl & Juve)Hide

Formula:
~(Sc,Ta,Nb,Sn,Fe,Ti)4O8
Colour:
Black, with a weak brownish tint
Crystal System:
Orthorhombic
A variety of Ixiolite

A scandium-rich variety of ixiolite. The most Sc-rich samples are Sc-dominant (Bergstøl & Juve, 1988), and may be a new species.
See: http://www.mindat.org/mesg-7-72088.html.

A study of the refinement of the structure of scandian ixiolite from Heftetjern, Norway indicates that the structure is highly disordered and pseudo-orthorhombic, with a slight departure toward monoclinic symmetry (Raade & Kristiansen 2000).


Physical Properties of Scandian Ixiolite (of Bergstøl & Juve)Hide

Colour:
Black, with a weak brownish tint
Fracture:
Conchoidal

Chemical Properties of Scandian Ixiolite (of Bergstøl & Juve)Hide

Formula:
~(Sc,Ta,Nb,Sn,Fe,Ti)4O8

Chemical AnalysisHide

Oxide wt%:
 1
Ta2O548.00 %
Nb2O518.80 %
MnO2.40 %
FeO3.20 %
Sc2O318.80 %
Y2O30.10 %
TiO20.40 %
SnO27.30 %
Total:99 %
Empirical formulas:
Sample IDEmpirical Formula
1(Sc1.46Ta1.16Nb0.76Sn0.26Fe0.24Mn0.18Ti0.034.09O8
Sample references:
IDLocalityReference
1Heftetjern pegmatite, Tørdal, Drangedal, Telemark, NorwayBergstøl, S. & Juve, G. (1988). Scandian ixiolite, pyrochlore and bazzite in granite pegmatite in Tørdal, Telemark, Norway. Mineralogy and Petrology, 38:229-243

Crystallography of Scandian Ixiolite (of Bergstøl & Juve)Hide

Crystal System:
Orthorhombic
Cell Parameters:
a = 5.711 Å, b = 4.763 Å, c = 5.152 Å
Ratio:
a:b:c = 1.199 : 1 : 1.082
Unit Cell V:
140.14 ų (Calculated from Unit Cell)
Morphology:
The outline of the crystals are often rectangular or even square.

Occurrences of Scandian Ixiolite (of Bergstøl & Juve)Hide

Paragenetic Mode(s):

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Scandian Ixiolite (of Bergstøl & Juve)Hide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Bergstøl, S. & Juve, G. (1988): Scandian ixiolite, pyrochlore and bazzite in granite pegmatite in Tørdal, Telemark, Norway. A contribution to the mineralogy and geochemistry of scandium and tin. Mineral. Petrol., 38, 229-243.
Wise, M.A., Černý, P., Falster, A.U. (1998): Scandium substitution in columbite-group minerals and ixiolite. Canadian Mineralogist 36, 673-680.
Raade, G. and Kristiansen, R. (2000) Mineralogy and geochemistry of the Heftetjern granite pegmatite, Tørdal: a progress report. Norsk Bergverksmuseum Skrifter, 17: 19-25.

Internet Links for Scandian Ixiolite (of Bergstøl & Juve)Hide

Localities for Scandian Ixiolite (of Bergstøl & Juve)Hide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Norway
 
  • Telemark
    • Drangedal
      • Tørdal
Bergstøl, S. & Juve, G. (1988): Scandian ixiolite, pyrochlore and bazzite in granite pegmatite in Tørdal, Telemark, Norway. A contribution to the mineralogy and geochemistry of scandium and tin. Mineral. Petrol., 38, 229-243; Raade, G. & Kristiansen, R. (2000a): Mineralogy and geochemistry of the Heftetjern granite pegmatite, Tørdal: a progress report. Norsk Bergverksmuseum Skrifter. 17, 19-25
Mineral and/or Locality  
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