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Published online 29 May 2007 | Nature | doi:10.1038/news070528-2
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Silicon crystal cooked to perfection
Pure lump of silicon-28 could help to redefine the kilogram.
Researchers are a step closer to redefining the kilogram, thanks to the creation of the purest chunk of crystalline silicon-28 yet made.
Today's standard kilogram is defined by a chunk of platinum-iridium alloy kept in a vault near Paris, France.
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