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> One of the materials is most likely impossible to synthesize

Is this a "actual impossible because it's inherently contradictory", or "we just don't know how to do it yet but give us a year"?

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We don't know a way to precisely place atoms in a checkerboard pattern like that, without getting it so hot that the arrangement is destroyed.

It maybe could be possible but beyond the reach of current material science.

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I personally thinks that’s the more optimistic of the two options; I’ll take it as a win for today
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"Likely Impossible" as in, we would need a revolutionary discovery in how thermodynamics apply to crystal formation.
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