Ullmannite

Ullmannite

Ullmannite is a nickel antimony sulfide mineral with formula: NiSbS. Considerable substitution occurs with cobalt and iron in the nickel site along with bismuth and arsenic in the antimony site. A solid solution series exists with the high cobalt willyamite. It is steel-gray to tin white in colour with a metallic luster. It has a Mohs hardness of 5 to 5.5 and a specific gravity of 6.65. It crystallizes in the isometric crystal class and typically exhibits cubic, octahedral, or pyritohedral forms although euhedral crystals are rare. Crystal twinning is common.

Principal localities are in Germany, it is also found in Austria, Australia, France, England, and Wales.

It was discovered in 1843 at the Storch und Schöneberg Mine, North Rhine-Westphalia, Germany and named for the German chemist and mineralogist, Johann Christoph Ullmann (1771-1821).

ee also

*List of minerals
*List of minerals named after people

References

* Palache, C., H. Berman, and C. Frondel (1944) "Dana’s system of mineralogy", (7th edition), v. I, 301–302.
* [http://rruff.geo.arizona.edu/doclib/hom/ullmannite.pdf Mineral Data Publishing, PDF]
* [http://webmineral.com/data/Ullmannite.shtml Webmineral data]
* [http://www.mindat.org/show.php?id=4086&ld=1&pho= Mindat with location data]


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  • Ullmannite — Ull mann*ite, n. [So named after J. C. Ullman, a German chemist.] (Min.) A brittle mineral of a steel gray color and metallic luster, containing antimony, arsenic, sulphur, and nickel. [1913 Webster] …   The Collaborative International Dictionary of English

  • ullmannite — ulmanitas statusas T sritis chemija apibrėžtis Mineralas. formulė NiSbS atitikmenys: angl. ullmannite rus. ульманнит …   Chemijos terminų aiškinamasis žodynas

  • ullmannite — noun A nickel antimony sulphide mineral …   Wiktionary

  • ullmannite — ull·mann·ite …   English syllables

  • ullmannite — ˈəlməˌnīt noun ( s) Etymology: German ullmannit, from Johann C. Ullmann died 1821 German mineralogist + German it ite : a mineral NiSbS consisting of nickel antimonide and sulfide, usually containing a little arsenic, and occurring massive with… …   Useful english dictionary

  • Ullmannit — Chemische Formel NiSbS Mineralklasse Sulfide 2.EB.25 (8. Auflage: II/D.18 40) (nach Strunz) 02.12.03.03 (nach Dana …   Deutsch Wikipedia

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  • Gersdorffite — is a nickel arsenic sulfide mineral with formula NiAsS. It crystallizes in the isometric system showing diploidal symmetry. It occurs as euhedral to massive opaque, metallic grey black to silver white forms. Gersdorffite belongs to a solid… …   Wikipedia

  • Antimonnickelglanz — Dieser Artikel wurde aufgrund von formalen Mängeln an Gestaltung bzw. Form und/oder inhaltlichen Mängeln auf der Qualitätssicherungsseite des WikiProjekts Minerale eingetragen. Dies geschieht, um die Qualität der Artikel aus dem Themengebiet… …   Deutsch Wikipedia

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