I made it using the first method from Fe(NO3)3 and oxalic acid.
> Date: Fri, 17 Apr 2009 08:28:53 +0200 > From: email@example.com > Subject: Re: Fe oxalate (was: pt/pd stops) > To: firstname.lastname@example.org > > > Ferric oxalate 26%. Ferric oxalate is homemade via the nitric acid route. It is the nicest I ever tested and keeps forever. > > Did you make it from the direct reaction Fe(NO3)3 + Oxalic acid powders > (Vicente-M. Vizcay Castro instructions in > http://home.att.net/~jeffrey.d.mathias/guide/FO_intro.htm) or in nitric acid > solution (Gmelin Handbook of Inorganic and Organometallic Chemistry)? > I made it once by the second way, obtaining after some days a huge single > crystal of Fe(III) oxalate. > BTW, I don't suggest to make this last way if you have not a fume hood. > > Alberto