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I'm aware that the densest stable element is osmium at 22.61 g/cm^3.

And that there are unstable elements such as hassium and meitnerium which are predicted to have densities of 41 g/cm³ and 37.4 g/cm³ respectively, but those have half lives of only a few seconds.

I'm also aware that things like quark-gluon plasma has been made in the LHC that is also much denser.

But I'm also aware that the main reason for osmium's high density is not its number of nucleons, as there are a few stable elements that have more nucleons but are less dense such as lead and gold, so much as it's chemical structure leading it's nuclei being closer together.

Is there some alloy or compound that has a higher density than osmium that has been produced in macroscopic quantities, and after having been produced remains denser than osmium at 1 atm of external pressure?

Edit: I've already seen Is there a compound denser than the densest element. But while that might have been the title of that poster's question, it wasn't the crux of what they were after. They really wanted to know what they could buy that was denser than mercury for use as a prop. And the only answers only address that part and not the crux of my question. Furthermore, I am aware that such materials DO exist, I'm specifically asking which ones have been produced here on earth in macroscopic quantities at 1 atm.

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  • $\begingroup$ Seems to be a duplicate of physics.stackexchange.com/q/60022 $\endgroup$ – dmckee Feb 16 '17 at 20:19
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    $\begingroup$ @dmckee Maybe in question title alone. That question was specifically asking the cheapest way to actually get his hands on a material more dense than mercury. And the only answers talk about pure elements and their prices. I'm specifically asking about alloys and compounds that are denser than the densest thing mentioned in that question and it's answers. It's not a duplicate. $\endgroup$ – Shufflepants Feb 16 '17 at 20:24
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    $\begingroup$ I suppose that question mentions the possibility of alloys heavier than osmium, but that was not really key to his question. And the accepted answer does not answer my question. $\endgroup$ – Shufflepants Feb 16 '17 at 20:25
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The density of given material is dew to it's crystal lettuce. If go through crystallography you will find that centered cubic system as it is of the gold is the most dens packed one. Though the nano materials basically nano powders may have density bigger than normal materials.

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