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Re: [ccp4bb]: uranium
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K3UO2F5, a less-reactive version of UO2(OAc)2, is very easily prepared by
mixing KF (not NaF) with UO2(OAc)2. Reference is: W.H. Zacharisen (1954) Acta
Cryst. 7, 783-7. He made it and did the crystal structure. Beautiful
apple-green crystals! Try it!
By the way, unless you get depleted UO2(OAc)2 (probably not available!), it is
slightly radioactive, due to small amounts of shorter-half-life isotopes, as
well as (substantially radioactive) decay products. See:
http://www.ieer.org/fctsheet/uranium.html or
http://www.world-nuclear.org/index.htm
By the way, in the US at least, you can mail (natural) uranium-containing
products by US Postal Service (http://www.usps.com/cpim/ftp/pubs/pub52.pdf),
as long as the package is properly marked (USPS Packaging Instruction 7A), and
does not contain more than 15 g of U-235 (i.e. no more than ~2 kg total
natural uranium). "Radioactive Material, excepted package-articles
manufactured from natural uranium (or natural thorium), UN2910"
Enjoy!
Dave
~~~~~~~~~~~~~~~~~~~~~~~~
David Borhani
Group Leader, Biochemistry
Vox: 508-849-2944
Fax: 508-755-8361
Email: david.borhani@abbott.com
Smail: Abbott Bioresearch Center, Inc.
100 Research Drive
Worcester, MA 01605 U.S.A.
~~~~~~~~~~~~~~~~~~~~~~~~
Phil Evans
<pre@mrc-lmb. To: ccp4bb@dl.ac.uk
cam.ac.uk> cc:
Sent by: Subject: Re: [ccp4bb]: thorium
owner-ccp4bb@
dl.ac.uk
10/17/02
01:12 PM
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I suspect that rather than UF6 what is referred to here is UO2F5-,
which relatively harmless, and can allegedly be made by mixing uranyl
acetate (or nitrate) with KF
Phil
klaas@ultr.vub.ac.be writes:
>
> >
> >
> > I think one reason is that it is very hard to buy it anywhere - there=20
> > are several useful reagents that appear in older textbooks (e.g.=20
> > Blundell and Johnson) such as UF6 salts that are no longer available.=20
> > Maybe somebody knows better ??
> >
>
> It might be radioactive and very toxic and reacting violently with
> water and stuff. People became very nervous when a ship loaded with UF6
sank
> before the Belgian cost a couple of years ago.
>
> I think I'm very happy that stuff like that isn't easy to get.
> Some people do know better by now.
>
> Nevertheless, rumours are that you can buy any uranium salt you want in
> certain republics of the former Soviet Union when you pay in dollar (maybe
> euro now).
>
> Klaas
>