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Besi
Joined: 06 Mar 2010
Posts: 32
Location: Serbia
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 Posted: Dec 06, 2011 15:44 Post subject: Marmatite, Sphalerite, Galena. |
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Hi, I've got a question?
Can somebody please tell me the difference between Marmatite, Sphalerite and Galena.
Thnx. |
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GneissWare
Joined: 07 Mar 2008
Posts: 1287
Location: California
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| Posted: Dec 06, 2011 15:54 Post subject: Re: Marmatite, Sphalerite, Galena. |
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Sphalerite - (Zn,Fe)S
Galena - PbS
Marmatite - Iron-rich Sphalerite
Marmite - a milder form of Vegemite |
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Peter Megaw
Site Admin
Joined: 13 Jan 2007
Posts: 963
Location: Tucson, Arizona
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| Posted: Dec 06, 2011 18:08 Post subject: Re: Marmatite, Sphalerite, Galena. |
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Pure sphalerite is ZnS and colorless...with increased Fe or Mn it gets progressively darker. Marmatite is generally applied as an informal name when it gets opaque...about 8 to 9% FeS
Vegemite rules!!!
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Siempre Adelante! |
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Ed Huskinson
Joined: 15 Apr 2009
Posts: 318
Location: Kingman, Arizona
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| Posted: Dec 08, 2011 18:05 Post subject: Re: Marmatite, Sphalerite, Galena. |
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Vegemite rules!!!!
You crack me up Pete!!
So, what? you've been watching old I Love Lucy re-runs???
Thanks for the laugh.
Ed in Shafter
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La respuesta está en las rocas!! Estudiadlas!!
Ed |
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Besi
Joined: 06 Mar 2010
Posts: 32
Location: Serbia
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| Posted: Dec 08, 2011 19:46 Post subject: Re: Marmatite, Sphalerite, Galena. |
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Thnx but is there any whay to recognize them when I see them?
Thnx again. |
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GneissWare
Joined: 07 Mar 2008
Posts: 1287
Location: California
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| Posted: Dec 08, 2011 21:08 Post subject: Re: Marmatite, Sphalerite, Galena. |
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Try google for each -- use streak, hardness and fracture as search terms.
Marmite / vegemite - streak=brown, hardness=1?, fracture=none. |
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Jesse Fisher
Joined: 18 Mar 2009
Posts: 629
Location: San Francisco
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| Posted: Dec 09, 2011 01:33 Post subject: Re: Marmatite, Sphalerite, Galena. |
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| It's actually very easy to spot the people who put marmite on their toast each morning because they're the ones wearing argyle jumpers and sitting in the corner at the pub poking at their i-pads on Fridays after work because they don't have anyone to talk to... |
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Jordi Fabre
Overall coordinator of the Forum
Joined: 07 Aug 2006
Posts: 4899
Location: Barcelona
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