Just a thought....
Jonathan
Pekka Savolainen wrote:
Nope, as far as I know. This mirror-polished fellow was stored in the air-tight plastig-bag, and some 10 months it was a real beauty. Then it started to rust very fast, or in fact not only to rust, perhaps "boiling" is a good word for the process...;-
The beauty today;
http://www.dlc.fi/~nuuska/dronino.jpg
best,
pekka s
Jonathan Gore wrote:
Would storing it in a vacuum work?
Pekka Savolainen wrote:
Well, have tried everything except black magic and woodoo...;- Dronino is a quite old one, accordindg Verdansky from before 12:th century. Main part of the pieces was found from the very wet area, so I suppose, the chlorides are not the only problem..., the meteorite is just too old and have spent too much time in a wet soil.
http://www.geokhi.ru/~meteorit/dronino1-e.html
As I told in my former e-mail, after all tricks my pieces stayed stable some 8 - 10 months, the pieces without any methods to stabilizie them couple of weeks, not much longer.
If some happens to find to way to stabilizate this very interresting meteorite indeed, please, let me know...
best,
pekka s
Stephen McMann wrote:
Dear Pekka and List,
Has anyone ever tried some of the tried and true iron stabilization
techniques on Dronino, such as a long bath in an alcohol and NaOH rich
solution to remove chlorides? On a related subject, I guess that I may not
really understand the chemistry behind why some meteorites are stable, and
some are not. Perhaps I will naively ask, "Is it all about chlorides?"
Sincerely,
Stephen McMann
-----Original Message-----
From: Pekka Savolainen [mailto:[EMAIL PROTECTED] Sent: Thursday, November 25, 2004 5:33 PM
To: Stephen McMann
Cc: [EMAIL PROTECTED]
Subject: Re: [meteorite-list] Nice Dronino?
They are not stable. The older pieces was slag in a few weeks or months,
the new "stable" ones in 8 - 10 months. I have just one very thin piece not
distroyed, just because it has a quite heavy lacquer. Fastest ruster I have
ever seen ;-
best,
pekka
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