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Author: Subject: Reduction of cerium oxide to metal
blogfast25
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[*] posted on 6-6-2013 at 13:47


Quote: Originally posted by MrHomeScientist  
If you do want to go the fluoride route, I have quite a bit of ammonium bifluoride. I can give you a bit, as long as you promise to be OBSCENELY CAREFUL with it! (and release me from all liability :P )


If all you use it for is to precipitate some CeF3 then that's hardly very dangerous.




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MrHomeScientist
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[*] posted on 7-6-2013 at 05:08


Quote: Originally posted by blogfast25  

If all you use it for is to precipitate some CeF3 then that's hardly very dangerous.


Well, the original bifluoride solution you make would be. But yes, once you use it all to make the precipitate then you're fine. Make sure to use an excess of the soluble cerium salt. When I used mine to make neodymium fluoride, I used an excess of Nd-sulfate and afterwards rinsed all my containers several times with CaCl2 solution.
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blogfast25
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[*] posted on 7-6-2013 at 05:14


Quote: Originally posted by MrHomeScientist  

When I used mine to make neodymium fluoride, I used an excess of Nd-sulfate and afterwards rinsed all my containers several times with CaCl2 solution.


Better still: use a small excess of NH4HF2 in plastic ware. PP lab beakers, funnels etc are cheap as chips.

[Edited on 7-6-2013 by blogfast25]




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[*] posted on 7-6-2013 at 07:23


Quote: Originally posted by MrHomeScientist  
Interesting stuff. What is your source of cerium?

If you do want to go the fluoride route, I have quite a bit of ammonium bifluoride. I can give you a bit, as long as you promise to be OBSCENELY CAREFUL with it! (and release me from all liability :P )

Hmm. Tempting, really tempting... but I'll wait on fluorides until I've exhausted myself with chlorides. Thanks for the offer, though!
I got my cerium dioxide from Elemental-Scientific - it's a light brown powder.




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[*] posted on 7-6-2013 at 12:49


Quote: Originally posted by elementcollector1  
I got my cerium dioxide from Elemental-Scientific - it's a light brown powder.


That's stuff seems to come in all colours of the rainbow. I've just bought some 'high grade' [ahem!] CeO2 (not glass polishing crap) and it's supposed to be off-white. Wait and see when I get it...




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[*] posted on 7-6-2013 at 12:53


I've worked with the off-white stuff, too - apparently it's extra pure. This stuff is lab grade, though, and I see no trace of iron hydroxides, salts, etc., which tend to override some other colors (especially the hydroxide).



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[*] posted on 28-6-2013 at 12:52


No time to read it all but this looks like an interesting book. http://books.google.com/books?id=iIdNAAAAMAAJ&pg=PA59&am...
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