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May contain minor Al and P.
Crystal System:
Anthropogenic phase, found in iron-rich slags.

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Chemical Properties of IscoriteHide


May contain minor Al and P.
Idealised Formula:

Crystallography of IscoriteHide

Crystal System:
Class (H-M):
2/m - Prismatic
Cell Parameters:
a = 21.336 Å, b = 3.0679 Å, c = 5.8744 Å
β = 98.06°
a:b:c = 6.955 : 1 : 1.915
Unit Cell V:
380.72 ų (Calculated from Unit Cell)
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.
  • 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.
  • 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).
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