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|Colour:||Black, blue-black, or ...|
|Name:||After J.C. Ilsemann (1727-1822), a former Mining Commissioner at Clausthal, Harz, who published an early study of molybdenite (1787).|
See also the visually similar mourite.
Classification of Ilsemannite
|Strunz 8th edition ID:||4/E.03-30|
|Nickel-Strunz 10th (pending) edition ID:||4.FJ.15|
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
F : Hydroxides (without V or U)
J : Hydroxides with H2O +- (OH); corner-sharing octahedra
|Dana 8th edition ID:||188.8.131.52|
4 : SIMPLE OXIDES
6 : Miscellaneous
|Hey's CIM Ref.:||7.15.4|
7 : Oxides and Hydroxides
15 : Oxides of Mo and W
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Type Occurrence of Ilsemannite
|Type Locality:||Bad Bleiberg, Bleiberg District, Gailtaler Alpen & Karnische Alpen, Carinthia, Austria|
|Year of Discovery:||1871|
Physical Properties of Ilsemannite
|Colour:||Black, blue-black, or blue; turns blue on exposure|
Crystallography of Ilsemannite
|Morphology:||Earthy masses or crusts; as a stain or disseminated pigment.|
Chemical Properties of Ilsemannite
|Essential elements:||H, Mo, O|
|All elements listed in formula:||H, Mo, O|
Relationship of Ilsemannite to other Species
|Related Minerals - Nickel-Strunz Grouping):|
|Related Minerals - Hey's Index Grouping:|
Other Names for Ilsemannite
|Health Warning:||No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.|
References for Ilsemannite
Höfer (1871), Jb. Min.: 566.
Horton (1916), US Bureau of Mines Bulletin 111: 15.
Schaller (1917), WashingtonAc Sc., Journal: 7: 417.
Hess (1923), USGS Bulletin 750A.
Palache, Charles, Harry Berman & Clifford Frondel (1944), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana Yale University 1837-1892, Volume I: Elements, Sulfides, Sulfosalts, Oxides. John Wiley and Sons, Inc., New York. 7th edition, revised and enlarged: 603-604.
Staples, Lloyd William (1951), Ilsemannite and jordisite: American Mineralogist: 36: 609-614.
Internet Links for Ilsemannite
Localities for Ilsemannite
The 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.
(TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.