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Registered Member #96
Joined: Thu Feb 09 2006, 05:37PM
Location: CI, Earth
Posts: 4062
Hi all.
Apologies for the long post but..
you may know that I received some gallium metal. Upon alloying it with indium I attempted to "paint" some onto a square glass vessel with the intention of using it as an electrolysis cell. Metered it, and it measured around 3-4 ohms across long axis of container, and then did the plating experiment using bicarbonate solution and a silver plated copper wire. Needless to say it didn't work. Resistance increased to 1-2K, and the alloy "balled up" and fell off the edges. $!£*!.
Figured that I could probably salvage some of the alloy by mopping up with Al foil, which somewhat worked. Put this and some fresh GaIn alloy in a test dish, and attempted to recover some of the lost alloy by allowing it to react.
Put alloy mixture into distilled water a few hours later, got a ball of GaIn + some Al. Upon returning the next day it had partially reacted again and oxidised.
Tried again, this time adding more water to (hopefully salvage some more). Upon returning two days later all the water had evaporated, leaving some strange silvery crystals, particles of unreacted Ga and some black "ash".
Upon putting this into more water, I tried putting a magnet near it while the metal was reacting. Interestingly, some of the previously inert crystals caused the solution to rotate away from the magnet pole. Some of the black crystals aligned with the pole when put in a separate jar, and followed it around.
Any ideas? this seems a little strange, as none of the metals I used contained iron. The properties seem centred on the whitish metallic crystals, which don't dissolve in water.
Registered Member #543
Joined: Tue Feb 20 2007, 04:26PM
Location: UK
Posts: 4992
According to European Patent Specification EP 0 75685B1 aluminium foil may contain 1.2% - 2% Fe, as well as Mn, Mg, Si, and Ti, the balance being made up by commercial grade aluminium.
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<OT> Failed experiment yields unusual "magnetic" crystals
