This is my first post and I have done a lot of searching on this site before posting. All of you are very smart in your craft and I have learned a lot, but I cannot determine if this is Rhodium, its about 22 grams worth, non magnetic, the large piece I held to a Map torch for about 8 minutes and turned the color you see, did not melt. Thanks for your feedback. By the way it does not react with any acid.
Can anyone tell me if this is Rhodium
- Thread starter pena4250
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Did you melt that material into the form shown in the photo, or did you receive it this way? Do you know how the metal or alloy shown was melted into it's current form?
Rhodium tests can be found in the General Reaction lists of the forum, in the Guided Tour link below.
Here's the wiki article on Rh
Wiki Rhodium
Pure Rhodium should not oxidize when heated normally, so it should not discolor. Pure Rh is attacked slowly by hot, 85%+, sulfuric acid forming a dark red-brown solution that will test positive to stannous chloride.
If I were a betting man, I would say it's not Rhodium, but proper testing may prove it contains some Rh (or not). The reason I say this is that the material is not shiny enough to be Pure Rhodium and the surface discolored when you heated it.
Steve
Rhodium tests can be found in the General Reaction lists of the forum, in the Guided Tour link below.
Here's the wiki article on Rh
Wiki Rhodium
Pure Rhodium should not oxidize when heated normally, so it should not discolor. Pure Rh is attacked slowly by hot, 85%+, sulfuric acid forming a dark red-brown solution that will test positive to stannous chloride.
If I were a betting man, I would say it's not Rhodium, but proper testing may prove it contains some Rh (or not). The reason I say this is that the material is not shiny enough to be Pure Rhodium and the surface discolored when you heated it.
Steve
Thanks for the response Steve and yes I received it in that form and no I do not know how it got into its present form, I bought it off Ebay last year listed as an unknown metal from a Pawn Shop going out of business, I paid like $19 for it.. I will check out the link you provided and try and figure out what I have....
Most likely not. Stuff is a dog to melt.
If you still think it is rh try to fuse some with sodium bisulfate or boil in concentrated sulfuric.
Just be very respectful of the acid.
Then refer to the info Steve gave you to read on how to proceed from there..
Even sodium bisulphate in water will disolve a small amount of rh. Just not sure the steps to confirm rh if you were to try this one.
Just be very respectful of the acid.
Then refer to the info Steve gave you to read on how to proceed from there..
Even sodium bisulphate in water will disolve a small amount of rh. Just not sure the steps to confirm rh if you were to try this one.
solar_plasma
Well-known member
Once I found a nice trick on the net to measure more exactly: fill the glass only half, weigh in gramm (a), hang the button knotted to a string into the water without touching the glass, weigh in gramm again (b), tare, let the button sink down, weigh again in gramm (c)
b-a= volume in ccm
buttons weight (c)/volume=density
using tare function at all steps can make this even easier, just harder to me to explain in my third language
