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UM1974-16-Se:CoFe

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Formula:
(Co,Fe)S2
Not the Fe-bearing discredited hastite; possibly equal to trogtalite (however differs in optical properties).

Very fine star-shaped crystals; subhedral and anhedral grains, up to 100 microns, in calcite from Habři, Žďár nad Sázavou area, Czech Republic. Associated with berzelianite, eskebornite, eucairite, and umangite.


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Optical Data of UM1974-16-Se:CoFeHide

Type:
Anisotropic
Anisotropism:
strong, brownish-yellow to brown (air), yellowish-brown to brown (oil)
Bireflectance:
strong, creamy to yellow
Reflectivity:
589nmR1=40.6%R2=44.4%

Reflectance graph
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 44.4%.
R1 shown in black, R2 shown in red
Colour in reflected light:
bright yellowish-white with a slight pink tint

Chemical Properties of UM1974-16-Se:CoFeHide

Formula:
(Co,Fe)S2

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 UM1974-16-Se:CoFeHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
De Montreuil, L. (1974): An unknown cobalt-iron selenide. El Ingeniero Geol. Univ. Nacl. Mayor de San Marcos, Geol.: 16: 65-70 (in English); in: Fleischer, M., Chao, G.Y., Cabri, L.J. (1975): New mineral names. American Mineralogist: 60: 738
Smith, D.G.W., Nickel, E.H. (2007): A System of Codification for Unnamed Minerals: Report of the SubCommittee for Unnamed Minerals of the IMA Commission on New Minerals, Nomenclature and Classification. Canadian Mineralogist: 45: 983-1055; http://nrmima.nrm.se/Valid2009_03.pdf (2016)

Internet Links for UM1974-16-Se:CoFeHide

Localities for UM1974-16-Se:CoFeHide

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.
Czech Republic
 
  • Vysočina Region
    • Žďár nad Sázavou District
      • Rožná
        • Rožná deposit
De Montreuil, L. (1974): An unknown cobalt-iron selenide. El Ingeniero Geol. Univ. Nacl. Mayor de San Marcos, Geol.: 16: 65-70 (in English); in: Fleischer, M., Chao, G.Y., Cabri, L.J. (1975): New mineral names. American Mineralogist: 60: 738
 
Mineral and/or Locality  
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