| 词条 | Germanite | |||||||||||||||||||
| 释义 |
| name = Germanite | category = Sulfide mineral | boxwidth = | boxbgcolor = | image = Germanite.jpg | imagesize = | caption = Germanite, probably from the Tsumeb Mine, Oshikoto Region, Namibia. Specimen size 5 cm | formula = Cu26Ge4Fe4S32[1] | molweight = | strunz = 2.CB.30 | dana = 2.9.4.2 | system = Isometric | class = Hextetrahedral ({{overline|4}}3m) H-M symbol: ({{overline|4}} 3m) | symmetry = P{{overline|4}}3n | color = Reddish grey tarnishing to dark brown | habit = Usually massive; rarely as minute cubic crystals | cleavage = None | tenacity = Brittle | mohs = 4 | luster = Metallic | streak = Dark grey to black | gravity = 4.4 to 4.6 | density = | diaphaneity = Opaque | other = Cell data: a = 10.585 Å Z = 1[2] | references = [2][3] }}Germanite is a rare copper iron germanium sulfide mineral, Cu26Fe4Ge4S32. It was first discovered in 1922, and named for its germanium content.[2] It is only a minor source of this important semiconductor element, which is mainly derived from the processing of the zinc sulfide mineral sphalerite.[4] Germanite contains gallium, zinc, molybdenum, arsenic, and vanadium as impurities.[2] Its type locality is the Tsumeb Mine in Namibia where it occurs in a hydrothermal polymetallic ore deposit in dolostone in association with renierite, pyrite, tennantite, enargite, galena, sphalerite, digenite, bornite and chalcopyrite.[3] It has also been reported from Argentina, Armenia, Bulgaria, Cuba, Democratic Republic of Congo (Zaire), Finland, France, Greece, Japan, Republic of Congo (Brazzaville), Russia and the United States.[5]
References1. ^American Mineralogist (1984) 69:943-947 {{Commons category}}{{sulfide-mineral-stub}}2. ^http://webmineral.com/data/Germanite.shtml Webmineral 3. ^1 http://rruff.geo.arizona.edu/doclib/hom/germanite.pdf Handbook of Mineralogy 4. ^U.S. Geological Survey (2008), "Germanium—Statistics and Information", U.S. Geological Survey, Mineral Commodity Summaries http://minerals.usgs.gov/minerals/pubs/commodity/germanium/ 5. ^1 2 3 http://www.mindat.org/min-1681.html Mindat.org 6. ^Dana's New Mineralogy, 8th edition, Gaines et al., Wiley 5 : Copper minerals|Iron minerals|Sulfide minerals|Germanium minerals|Cubic minerals |
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