Semseyite
| Semseyite | |
|---|---|
 | |
| General | |
| Category | Mineral |
Semseyite is a rarely occurring mineral and is part of the homologous class of lead antimony sulfides. It crystallizes monoclinically with crystals of unequal length and with the chemical composition Pb9Sb8S21. Additionally, mineral aggregates from dark gray to black.
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etymology and history
For the first time Semseyit in „the mine Baia Sprie was found “(Felsöbánya mine) in Romania and 1881 through József Sándor Krenner (1839-1920). It designated after mineral Andor of Semsey (1833-1923), a Hungarian Edelmann and Hobbymineralogen.
classification
In old systematics of the minerals after Strunz (8th edition) the Semseyit still belonged to the summarized department of the Sulfosalze. With 9. Edition of Strunz' mineral systematics this department was redefined and subdivided besides more precisely after the cations taken part in the chemical formula. The mineral is in to the again formed now accordingly department „of the Sulfosalze with SnS as model “and forms there together with Fülöppit, Heteromorphit, Plagionit and Rayit an own group within the subsection of the SnS Sulfosalze with lead as additional cation.
In systematics of the minerals after Dana the Semseyit is likewise “assigned to the class „of the sulfides and Sulfosalze. There he is in the department „of the Sulfosalze with the relationship 2,0 < z/y < 2,49 and the composition (A+) i (A2+) j [ByCz] “. There it forms likewise together with Fülöppit, Heteromorphit, Plagionit and Rayit Fülöppitgruppe” (monoclinically: C2/c contains Pb, self-service).
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education and discovery sites
Semseyit separates in hydrothermal solution EN at middle temperatures between 300 and 350° C ab[2]. Begleitminerale are among other things Bournonit, Jamesonit, quartz, Sphalerit and Zinckenit.
Beside its type locality Baia Sprie was found the mineral in Romania still in „the mine Herja “(Baia Mare) and Satu Mare. Herja is considered thereby as one of the best occurrences for Semseyit at all, with mineral finds between and three centimeters a size and technical or rosettenförmigem AussehenCite error: The <ref> tag has too many names (see the help page)..
World-wide Semseyit could so far at 132 discovery sites proven (conditions: 2009) [3] become, so among other things in Jujuy and Salta in Argentina; unite regions of the Bolivian departments Oruro and Potosí; with Chaskowo in Bulgaria; in the Chinese region Yizhang; several regions of Germany and France; unite regions Great Britain; in Bhilwara (India); Iran; Ireland; the Italian regions Piedmont and Tuscany; on Honshū in Japan; in British Columbia and Ontario in Canada; with upper mountain at the burner in Austria; Peru; in circle Maramureș in Romania; in the eastern and western regions Siberia s; Slovakia; Spain; in the Czech Bohemia; in the Hungarian “Pilsengebirge” as well as unite regions The USA.
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structure
Semseyit crystallizes in the monoclinic crystal system in space group “C 2 C” with lattice parameters the n a = 13,603 Å, b = 11,936 Å, c = 24,453 Å and β = 106,047°[4] as well as four formula unit EN per elementary cell [5]
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see also
References
Literature 
Oral literature Major written forms Long prose fiction Short prose fiction Prose genres Fiction Non-fiction Poetry genres Narrative Lyric Lists Dramatic genres History Lists and outlines Theory and criticism 
Literature portalLiterature Oral literature Major written forms Long prose fiction Short prose fiction Prose genres Fiction Non-fiction Poetry genres Narrative Lyric Lists Dramatic genres History Lists and outlines Theory and criticism Literature portalExternal links
Wikimedia Commons has media related to Semseyite.- mineral data sheet - Semseyite (English, pdf 64.5 KB)
- Christian of Bremen: “Mineral first descriptions in Baja Mare, Baja Sprie, Zlatna & Banat” - Semseyit
- ^ J.J. Périchaud : "Les Gisements Métalliques du District à Antimoine de Brioude-Massiac (Massif Central Français)", BRGM, 1968
- ^ Andreas Kamrath: “Geology and mineralogy of ore stores Herja”
- ^ MinDat - Localities for Semseyite
- ^ American Mineralogist Crystal Structure DATA base - Semseyite (English, 1974)
- ^ Cite error: The named reference
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