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what is the chemical formula for the tarnish on Bornite that gives it the beautiful colors?

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asked Oct 10, 2017 by solstump (120 points)

1 Answer

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Not sure if the tarnish itself different from the actual formula inherent to the bornite. It is possible that sulfur dioxide or hydrogen sulfide from the atmosphere mixes in the outer layer, causing the tarnish, but I have not heard of any different formula for the tarnish of bornite.
answered Oct 27, 2017 by hershel (51,840 points)