User:Strickja/Germanite

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{{Infobox mineral

| name = Germanite

| category = Sulphide mineral

| boxwidth = 24

| boxbgcolor =

| image = Germanite.jpg

| caption = Germanite, probably from the Tsumeb Mine, Otjikoto Region, Namibia. Specimen size 5 cm

| formula = Cu₂₆Ge₄Fe₄S₃₂American Mineralogist (1984) 69:943-947

| molweight = 3,192.14 g

| strunz = 2/C.10.20

| dana = 2.9.4.2

| color = Reddish grey tarnishing to dark brown

| habit = Usually massive; rarely as minute cubic crystals

| system = Isometric B43m

| cleavage = None

| tenacity = Brittle

| mohs = 4

| luster = Metallic

| streak = Dark grey to black

| gravity = 4.4 to 4.6

| density = 4.47

| diaphaneity = Opaquewebmineral.com/data/Germanite.shtml Webmineral

| other = Cell data: a = 10.585
Z = 1

| references = }}

Germanite is a rare copper iron germanium sulfide mineral, Cu₂₆Fe₄Ge₄S₃₂. It was first discovered in 1922, and named for its germanium content. It is only a minor source of this important semiconductor element, which is mainly derived from the processing of the zinc sulphide mineral sphaleriteU.S. Geological Survey (2008). "Germanium—Statistics and Information". U.S. Geological Survey, Mineral Commodity Summaries. http://minerals.usgs.gov/minerals/pubs/commodity/germanium/.. Germanite contains gallium Ga, zinc Zn, molybdenum Mo, arsenic As, and vanadium V as impurities. It's type locality (the place where it was first desribed) is the Tsumeb Mine in Namibia, and 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 USA [http://www.mindat.org/min-1681.html].

class="wikitable"
X-Ray Powder DiffractionDana's New Mineralogy, 8th edition. Gaines et al. Wiley
d spacing | 3.05 | 2.65 | 1.87 | 1.60 | 1.32 | 1.21 | 1.08 | 1.02
relative intensity | 10 | 1 | 7 | 4 | 1 | 2 | 2 | 1