Hello, Mark and the list,
think ferric chloride is not strong enough to etch Fe / Ni, but haven´t
ever tried...;-
You can find a quite good recipe for the etching solution from R.O.
Nortons book Rocks from Space (page 415). There is also advised,
how to check Ni from the potential meteorites (page 417).
You should have the nitric acid from the drug store, but if possible,
please, check the recipe first, you need also some other components
to make the mix. If you use 100 % nitric acid, the result may be, if
not a catastrophe, but quite near to that.
And even with not so strong solutions, latex gloves and goggles should
be worn to avoid to hurt yourself.
take care,
pekka
Mark Jackson wrote:
Dear List,I'm trying to locate etching solution capable of etching Widmanstatten patterns to view on meteorites. I understand it's nitric acid? I got the "bright" idea of checking my local electronic supply house for PC board etching solution and it seems that ferric chloride is used to etch copper from the breadboards. I got a B in college chemistry and that makes me question the usefulness of using ferric chloride on a meteo(rite/wrong). Am I correct in questioning this practice? Where can I find, or how can I extract, nitric acid to use if I am correct?Many thanks,Mark
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Pekka Savolainen Jokiharjuntie 4 FIN-71330 Rasala FINLAND + 358 400 818 912 Group Home Page: http://www.smartgroups.com/groups/eurocoin Group Email Address: [EMAIL PROTECTED]
