Most stable structure ?

The most stable?

A really low, and heavy rectangle. Why? Because it has a really low center of gravity, and it cannot tip over easily.

But, the strongest?
A triangle. Why? Because when you put pressure on any part of the triangle, the pressure is divided up around the 3 sides, making the tensile strength increase greatly.

 

Depends what you mean by 'stable' and 'structure'.

 

There is only one meaning for stable and structure, in this context:
Stable- –adjective, -bler, -blest.
not likely to fall or give way, as a structure, support, foundation, etc.; firm; steady.
Structure- –noun
mode of building, construction, or organization; arrangement of parts, elements, or constituents: a pyramidal structure.

 

The BCC crystal structure appears to have the lowest energy, IIRC. But, the various hexagonal packings are also quite stable.

 

This isn't generally true. It applies to iron at room temperature, for example, but not to aluminum, copper, gold, silicon, carbon, tungsten...

 

Ahhh. Sorry about that post there, I did not consider the question in the right context.

 

a sphere?

 

Well group 0/8 atoms such as neon have the most stable atoms because their outer shell is full of electrons and they can't react with other elements. I guess the strongest structure would be the lattis structure of diamond which has 4 bonds with other atoms I think.

 

What about Diamond? It's F[ace] C[entered] C[ubic], if I'm not wrong.

Isn't that pretty stable, considering its high melting temperature?