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After doing some research on gold purity, I found that the current record of gold fineness is at an astounding 999.999 fine achieved by the Perth Mint, Australia 1957. However, I could not find any other attempts to break this record.

I have also read the other related answers like this one: Obtaining 100% pure metal

I was hoping that perhaps some insight could be given as to how the current fineness record was achieved, and what refinement or fineness verification barriers may need to be overcome to achieve finer purities.

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  • $\begingroup$ And to what purpose? $\endgroup$ – Karl Apr 10 '18 at 5:28
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    $\begingroup$ Ever heard of zone-refining? chemistry-desk.blogspot.co.uk/2012/08/zone-refining.html $\endgroup$ – Waylander Apr 10 '18 at 7:56
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    $\begingroup$ My ion accelerator makes pure gold all the time - if an ion makes it down the beam line into the end station, it has mass 197 and charge 1. Now, getting a macroscopic amount takes something on the order of the Y-12 plant... $\endgroup$ – Jon Custer Apr 10 '18 at 13:14

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