[meteorite-list] Unusual phenomen during etching iron meteorites

[PolandMET]

Dear meteorite friends.
Tooday I etched some Maslyanino slices and beetween 10 of them, two slices 
do not want start etching. I was able to capture this very strange phenomen 
with my macro lens. I cant explain this. Maybe someone can ?

Let me explain whats going on here.
Normaly, when slice is placed in etching solution, etching starts 
immediately in the same second. But rarely, I can keep slice even 5 or 10 
minutes without any signs of etching. On this video, there is one of 10 
slices of Maslyanino that comes from same slice divided to smaller 
specimens, so material was prepared 100% the same. Only two of this 10 
slices can't be etched in normal way. They need a starter. This mean I need 
to scratch them with other slice to start etching. This is visible at 1:40 
when I finally use correct slice to start etch reaction. You can see then 
how solution move from the place of scratch in all direction and etching 
starts immediatelly.



https://www.youtube.com/watch?v=Sd9s56NuTVQ&feature=youtu.be

-----[ MARCIN CIMALA ]-----[ I.M.C.A.#3667 ]-----
http://www.Meteoryty.pl             marcin(at)meteoryty.pl
http://www.PolandMET.com       marcin(at)polandmet.com
http://www.Gao-Guenie.com      GSM: +48 (793) 567667
--------[ Member of Polish Meteoritical Society ]--------