saps
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Mn3O4 (manganeese oxide)
I know very little about Mn3O4. If anybody knows anything about Mn3O4 please inform me.
Thank you
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Scratch-
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You can make it by heating MnO2, and you can probably reduce it with aluminum or magnesium to get manganese.
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unionised
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It's black.
It has a density of 4.856 g/cc.
It's also known as hausmannite
It's the subject of a rather open-ended question in this thread.
What do you want to know?
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saps
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do you know if it can be toxic?
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neutrino
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Judge for yourself: MSDS
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kclo4
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Mn2O3 to MnO2
How would you go about turning Mn2O3 to MnO2?
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12AX7
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Well, a strong oxidizer obviously.  Maybe not -- MnO2 occurs naturally, perhaps
Mn2O3 / 3.4 "rusts" to MnO2 (like iron skipping divalence, rusting to Fe2O3 instead).
Tim
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kclo4
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Is it possible to make permanganates from Mn2O3?
[Edited on 20-3-2005 by kclo4]
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JohnWW
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Yes, you could, by dissolving it in a strong alkali to give the manganite, MnO2-; then either applying electrolysis, or adding a strong oxidant like
hyochlorite or chlorine gas or plumbate or bismuthate. This would give Na or K permanganate as the final product.
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uber luminal
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iv tried getting MnO2 from KMnO4 with electrolysis(at0.6v). its hard to determine though, since the solution is dark dark purple.(and I couldnt see
anything). I dried the solution in a vacuum oven and found a few bits of black powder in the left over KMnO4. I stopped when the computer showed a
drop in amperage. maybe a result of diminishing ions or something covoring the electrodes.
I found an easier way... the classic glycerin and permanganate. one of the products is your black MnO2. Not the best for getting it pure, but its a
way to get MnO2 if your desperate.
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