Inorganic
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How to dissolve NdF3 ?
Hi
I have a problem with dissolution Neodymium Fluoride. I try to dissolve NdF3 in any "solvent" like H2O, 30% HCl, H2SO4 50%, 30% oleum - without any
effect. Any suggest ?
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UnintentionalChaos
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Have you tried nitric acid? A lot of times, nitric dissolves funny stuff...like calcium sulfate to a reasonable extent...which caused me to lose
points on a chemical identification lab. Perhaps fusion with molten NaOH and dissolution of the mass would afford an oxide or hydroxide that can be
made to react more easily.
Department of Redundancy Department - Now with paperwork!
'In organic synthesis, we call decomposition products "crap", however this is not a IUPAC approved nomenclature.' -Nicodem
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Jdurg
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Be very careful that you don't liberate HF while trying these dissolutions. You wouldn't want to destroy any expensive glassware you have or your own
body.
\"A real fart is beefy, has a density greater than or equal to the air surrounding it, consists of the unmistakable scent of broccoli, and usually
requires wiping afterwards.\"
http://maddox.xmission.com. |
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ShadowWarrior4444
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| Quote: | Originally posted by Jdurg
Be very careful that you don't liberate HF while trying these dissolutions. You wouldn't want to destroy any expensive glassware you have or your own
body. |
Fusion with NaCl should provide NaF and NdCl3, which is quite a useful reagent for optical sciences. Though, NdF3 is as well:
http://cat.inist.fr/?aModele=afficheN&cpsidt=1972233
Perhaps you could find a Sol-Gel use for NdF3 and make your own laser crystals.
Ancillary: It seems your original intent is to dissolve NdF3 as itself, and not convert it to anything else. For this purpose I recommend either Ionic
Liquids or some clever organic ligand tricks. Researching sol-gel uses of NdF3 should give you information on the organic ligand part. As for Ionic
Liquids, one of them should be able to dissolve it, Choline Chloride/Glycerol is probably the most convenient, but will require research on
your part.
It might also help to know why you want to dissolve it--for what purpose. If it is to grow a large crystal of it, or to layer it on to MgF2, the
Sol-Gel methods would likely be the best.
[Edited on 7-12-2008 by ShadowWarrior4444]
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not_important
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The lanthanide fluorides are fairly resistant to common attacking solvents, in the reprocessing of nuclear fuel they resist solution in the nitric
acid based solutions used. If the goal is to get Nd(3+) into solution you need complexing agents for both the lanthanide and fluoride, or use
alkaline fusion (Na2CO3) to convert the fluoride to oxide, which can be dissolved in acids after washing away the NaF.
If you with to grow crystals of NdF3, there seems to be two main methods. For large crystals molten alkali (Li/Na/K) fluorides can be used. For
nano-scale crystals, generally controlled precipitation from aqueous solutions of soluble lanthanide complexes is used; this is often a hydrothermal
process run at supra-normal pressure.
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-jeffB
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| Quote: | Originally posted by ShadowWarrior4444
Ancillary: It seems your original intent is to dissolve NdF3 as itself, and not convert it to anything else. For this purpose I recommend either Ionic
Liquids or some clever organic ligand tricks. Researching sol-gel uses of NdF3 should give you information on the organic ligand part. As for Ionic
Liquids, one of them should be able to dissolve it, Choline Chloride/Glycerol is probably the most convenient, but will require research on
your part.
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I'd expect that one of the fluoride-based ionic liquids would be a better pick, but they're pretty pricey, and look like not much fun to work with.
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