itchyfruit
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calcium granules
What colour should calcium granules be ? mine are very dark pretty much black. I've tried cleaning some up in isopropanol but no joy is this an oxide
layer or is calcium this colour,i thought it was white!!
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bfesser
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Calcium is shiny and silvery when fresh. It quickly oxidizes and forms a layer of oxide, nitride, etc. quickly when exposed to air.
[Edited on 7/10/09 by bfesser]
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itchyfruit
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Thanks, i guess i'll just have to get a ampouled sample for my element collection.
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JohnWW
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That is correct, Bfesser. The stuff should be stored under either light mineral oil in a well-stoppered vessel or very pure argon, like sodium and
other alkali metals, so that air and water vapor cannot get at it. It is similarly obtained by the electrolysis of a molten halide salt under argon.
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