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UM1995-34-SO:Fe

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Formula:
FeS2O3
Quite often among carbonate-hosted Zn-Pb(Fe) ore mineralization in Upper Silesia, Poland (e.g., Pieczonka, 2010). The material coded as the "UM" species comes from the Amelia mine, Wisconsin, USA.

One of a few mixed/intermediate-valence Fe-S natural compounds known. In the carbonate-hosted ore deposits these compounds occur as subsulphites (see Unnamed (Fe Subsulphite)), sulphites (Unnamed (Fe Sulphite), Unnamed (Zn Sulphite)), pyrosulphites (Unnamed (Fe Pyrosulphite)), sulphoxylanes (Unnamed (Fe Sulphoxylane)), thiosulphates (compare Unnamed (Fe Thiosulphate II) and Unnamed (Pb Thiosulphate)).

These compounds are generally banded/radial/fibrous/spherulitic in form and have lowered reflectivity with growing sulphur valence. Compare also Unnamed (Fe Oxysulphide).

Upper Silesia, Poland: Botryoidal, with outer rim often recrystallized to pyrite and marcasite. Also as fibrous, syntiaxial intergrowths with sulfides and sulfates. May be oxygen-deficient.

Wisconsin, USA: As a mixture with pyrite-marcasite, that forms black patches. Analysis given in the Chemistry section concerns a homogenous area 40-50 microns in size. Determined thanks to the fact, that the valence state of S is related to wavelength shifts in the peaks for S in the electron microprobe analysis (EPMA).

Compare viaeneite; albertiniite (a sulphite).


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Unique IdentifiersHide

Mindat ID:
47350
Long-form identifier:
mindat:1:1:47350:3

Similar NamesHide

Optical Data of UM1995-34-SO:FeHide

Bireflectance:
yes

Chemistry of UM1995-34-SO:FeHide

Mindat Formula:
FeS2O3
Element Weights:
Element% weight
S38.179 %
Fe33.246 %
O28.575 %

Calculated from ideal end-member formula.
Elements listed:
Fe, O, S - search for minerals with similar chemistry

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.

Internet Links for UM1995-34-SO:FeHide

References for UM1995-34-SO:FeHide

Localities for UM1995-34-SO:FeHide

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 references and 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 (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.
Belgium
 
  • Wallonia
    • Liège
Kucha et al. (1993)
Poland
 
  • Lower Silesian Voivodeship
Kucha H.
  • Silesian Voivodeship
    • Tarnowskie Góry County
      • Tarnowskie Góry
Pieczonka (2010)
USA
 
  • Illinois
    • Jo Daviess County
Kucha et al. (1995) +1 other reference
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