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Iscorite

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Formula:
Fe2+5Fe3+2SiO10
May contain minor Al and P.
Crystal System:
Monoclinic
Anthropogenic phase, found in iron-rich slags.


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Chemical Properties of IscoriteHide

Formula:
Fe2+5Fe3+2SiO10

May contain minor Al and P.
Idealised Formula:
Fe7SiO10

Crystallography of IscoriteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Cell Parameters:
a = 21.336 Å, b = 3.0679 Å, c = 5.8744 Å
β = 98.06°
Ratio:
a:b:c = 6.955 : 1 : 1.915
Unit Cell V:
380.72 ų (Calculated from Unit Cell)
Morphology:
Comment:
Space group I2/m (non-standard); originally assumed to be P21/m.

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 IscoriteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Smuts, J.; Steyn, J. G. D.; Boeyens, J. C. A. (1969): Crystal structure of an iron silicate, iscorite. Acta Crystallographica, B25, 1251-1255.
Modaressi, Ali; Malaman, Bernard; Gleitzer, C.; Tilley, R. J. D. (1985): Preparation and study of a mixed-valence iron oxysilicate Fe7(SiO4)O6 (iscorite). Journal of Solid State Chemistry 60, 107-114.
Nell, J.; Van Den Berg, J. C. (1988): Stability relations of iscorite (Fe7SiO10) in the system iron-silicon-oxygen. Transactions of the Institution of Mining and Metallurgy, Section C: Mineral Processing and Extractive Metallurgy 97, 53-60.
Rose, D.; Endlicher, G.; Mücke, A. (1990): The occurrence of 'iscorite' in Medieval iron slags. Historical Metallurgy 24, 27-32.
Smuts, J. (1992): Formation and morphology of iron silicate 'iscorite'. Ironmaking and Steelmaking 19, 111-119.
Smuts, J. (1994): Occurrences of iscorite in ironmaking and steelmaking materials. Process Mineral. XII, 331-343.
Van Aken, P. A., Miehe, G.; Woodland, A. B., Angel, R. J. (2005): Crystal structure and cation distribution in Fe7SiO10 ("iscorite"). European Journal of Mineralogy 17, 723-731.

Internet Links for IscoriteHide

Localities for IscoriteHide

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.
Australia
 
  • Queensland
    • Mount Isa City Shire
      • Mount Isa
        • Mount Isa Mines
Riley, J. F. (1978): Slag occurrences of djerfisherite and iscorite. Neues Jahrbuch für Mineralogie, Monatshefte 1978, 433-439.
Austria
 
  • Carinthia
    • Friesach - Hüttenberg area
      • Hüttenberg
        • Waitschach
Kolitsch, U., Brandstätter, F., Schreiber, F., Fink, R. & Auer, C. (2013): Die Mineralogie der weltweit einzigartigen Schlacken von Waitschach, Kärnten. Annalen des Naturhistorischen Museums in Wien, Serie A, 115, 19-87 (in German).
 
Mineral and/or Locality  
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