SharkD schrieb:
> 
> I wonder if a sphere is the optimal packing of silicon atoms. I doubt it.

At the atom level, the object those scientists are aiming for would 
indeed just be a rough approximation of a sphere, and instead keep its 
lattice structure (no "anti-aliasing" on that sphere, so to speak :-)). 
After all, it is a machined and polished Si monocrystal (like the stuff 
used in the semiconductor industry).

However, for the current target precision it will be good enough - and 
its dimensions will be easier to control than, say, a rectangular shape.

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