Andorite IV
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| Andorite IV | |
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| General and classification | |
| chemical formula | AgPbSb 3 S 6 |
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Mineral class (and possibly department) |
Sulfides and sulfosalts |
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System no. to Strunz and to Dana |
2.JB.40a ( 8th edition : II / E.23) 04/03/15/04 |
| Crystallographic Data | |
| Crystal system | orthorhombic |
| Crystal class ; symbol | orthorhombic-dipyramidal 2 / m 2 / m 2 / m |
| Twinning | after {110} |
| Physical Properties | |
| Mohs hardness | 3 to 3.5 |
| Density (g / cm 3 ) | 5.38 to 5.44 |
| Cleavage | no |
| Break ; Tenacity | shell-like |
| colour | gray to dark gray, yellow to brightly colored |
| Line color | black |
| transparency | opaque |
| shine | Metallic luster |
Andorite IV (originally andorite , synonym quatrandorite ) is a rarely occurring mineral from the mineral class of sulfides and sulfosalts . It crystallizes in the orthorhombic crystal system with the chemical composition AgPbSb 3 S 6 and develops opaque, prismatic or tabular, striped crystals , but also massive aggregates of gray color. In the air, the mineral turns yellow or brightly colored after a while due to " oxidation ".
Etymology and history
Andorite IV was named after the Hungarian nobleman, mineral collector and hobby mineralogist Andor von Semsey (1833-1923). It was first found and described in 1892 in the Baia Sprie mine in Romania.
Education and Locations
Andorite IV forms mainly hydrothermally in various lead (Pb) and silver (Ag) deposits . Accompanying minerals include jamesonite , cassiterite and stannite .
Locations include Jujuy and Salta in Argentina , Victoria in Australia , Oruro and Potosí in Bolivia , Hausach and Bräunsdorf / Oberschöna in Germany , Ontario in Canada , Baia Sprie in Romania , Třebsko in the Czech Republic and Nevada in the USA .
use
Andorite IV is occasionally used as a raw material for the extraction of silver when it is locally accumulated.
See also
Individual evidence
- ↑ IMA / CNMNC List of Mineral Names - Andorite IV and Andorite VI (English, PDF 1.29 MB; p. 6)
literature
- Petr Korbel, Milan Novák: Encyclopedia of Minerals . Nebel Verlag GmbH, Eggolsheim 2002, ISBN 3-89555-076-0 , p. 57 .
- Massimo Nespolo, Tohru Ozawa, Yusuke Kawasaki, Kazumasa Sugiyama: Structural relations and pseudosymmetries in the andorite homologous series (PDF; 2.8 MB) . In: Journal of Mineralogical and Petrological Sciences . 107, 2012, pp. 226-243.
Web links
- Mineral Atlas: Andorite IV (wiki)
- Webmineral - Andorite (Engl.)
- MinDat - Andorite and Andorite IV (English)