Slaughlin79
Well-known member
I am using copper to cement pgms out of solution that had quite a bit of copper in it and this is the result. Some of it,the fine sparkly precipitate in the filter,won’t dissolve in hot HCl and close to 30% H2O2 so I’m thinking rhodium but didn’t think I would see near the amount I’m seeing. And the other it almost looks like crystals growing on the copper,that I can scrape off pretty easy. Some of it just falls off. The fine stuff I’m pretty sure I know what it is but the crystal looking stuff I’m not so sure? If you think you might know what this is I’m all ears? I don’t think it could be any form of copper slat bc the solution acidic with HCl.