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|System:||Tetragonal||Colour:||Red, bluish red-black, ...|
|Name:||Named after its supposed discovery locality, Sierra de Umango (Umango Mountains), Argentina, although in reality it does not occur there but came rather from a neighbouring range called the Sierra de Cacho (see also text in http://www.mindat.org/loc-146779.html).|
Classification of Umangite
|IMA status:||Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"|
|Strunz 8th edition ID:||2/B.03-50|
|Nickel-Strunz 10th (pending) edition ID:||2.BA.25|
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
B : Metal Sulfides, M: S > 1: 1 (mainly 2: 1)
A : With Cu, Ag, Au
|Dana 8th edition ID:||220.127.116.11|
2 : SULFIDES
5 : AmBnXp, with (m+n):p = 3:2
|Hey's CIM Ref.:||3.1.11|
3 : Sulphides, Selenides, Tellurides, Arsenides and Bismuthides (except the arsenides, antimonides and bismuthides of Cu, Ag and Au, which are included in Section 1)
1 : Sulphides etc. of Cu
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Type Occurrence of Umangite
|Co-type Localities:||Las Asperezas mine (Sarmiento deposit; Veta Sarmiento), Sierra de Cacho, La Rioja, Argentina|
Trogtal Quarries, Lautenthal, Harz, Lower Saxony, Germany
|Year of Discovery:||1891|
Physical Properties of Umangite
|Colour:||Red, bluish red-black, iridescent violet-blue (tarnished)|
Crystallography of Umangite
|Cell Parameters:||a = 6.4Å, c = 4.28Å|
|Ratio:||a:c = 1 : 0.669|
|Unit Cell Volume:||V 175.31 Å³ (Calculated from Unit Cell)|
Chemical Properties of Umangite
|Simplified for copy/paste:||Cu3Se2|
|Essential elements:||Cu, Se|
|All elements listed in formula:||Cu, Se|
Relationship of Umangite to other Species
|Member of:||Berzelianite-Umangite Group|
|Other Members of Group:|
|Related Minerals - Nickel-Strunz Grouping):|
|Related Minerals - Hey's Index Grouping:|
Other Names for Umangite
|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 Umangite
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, 834pp.: 194-195.
Zeitschrift für Kristallographie (1891): 29: 269.
American Mineralogist (1950): 35: 337-364.
Ramdohr, P. (1955): Neues Jahrb. Monatsh. Mineral., 133-142.
Science: 152: 345.
Internet Links for Umangite
Localities for Umangite
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.