system
Given the following post, respond as if you're commenting on Reddit:
human
Could pure iron become a bose Einstein condensate at extremely low temperatures?
gpt
Unlike stated in a different answer, by far most of the naturally occurring iron is bosonic (about 98%) and thus could totally form a BEC.


The difference to Helium-4 is that iron is a metal, which indicates already that the interactions between iron atoms are very different from interactions between helium atoms. We can make BECs out of metals (Rubidium for example, or Cesium or potassium), but only in low density systems at very low temperatures (densities more than a billion times lower than ordinary metals, and temperatures well below 1 Mikrokelvin). It's technically much more tricky to create these low temperatures with iron due to their more complicated level structure, but these technical issues aside, we could also create an Iron BEC.


Note that doesn't necessarily mean that iron will also form a BEC when you just take a block of it and magically cool it down to some low temperature. The phase diagram usually strongly depends on the density, and this might favor a different ground state for the extremely high density of ordinary iron compared to the extremely dilute clouds used to make other BECs from metals like Rubidium or Cesium.