B Understanding Crystal Structures: Energy Considerations

Adeonaja
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We know most of our solids have crystal forms i.e. atoms arrange themselves in a regular beautiful way. But how can atoms know beforehand to arrange themselves in such ordered manner?
This questions is hovering on my mind from a long time. Why would something which does not have life would want to be in such a beautiful neighborhood, while the world is so much disordered. What causes them to be in that regular array and how they choose which crystal structure is suitable for them?
For now suppose for somehow any reason they want to be in that crystal form but then comes grains i.e. after a so short period of space their periodicity is broken! What decides all this?
From a simple Google search I came know something about energy consideration i.e. system energy is minimized in this form. But this answer seems very blurry would be great if someone emphasizes on this.
 
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Hi. I have got question as in title. How can idea of instantaneous dipole moment for atoms like, for example hydrogen be consistent with idea of orbitals? At my level of knowledge London dispersion forces are derived taking into account Bohr model of atom. But we know today that this model is not correct. If it would be correct I understand that at each time electron is at some point at radius at some angle and there is dipole moment at this time from nucleus to electron at orbit. But how...
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