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blogfast25
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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  ) |
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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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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| 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.
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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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elementcollector1
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| 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 ) |
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.
Elements Collected:52/87
Latest Acquired: Cl
Next in Line: Nd
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blogfast25
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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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elementcollector1
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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).
Elements Collected:52/87
Latest Acquired: Cl
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halogen
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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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