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Solid-state physics studies how macroscopic properties of solids (mechanical, electrical, optical, etc.) result from their microscopic structure. It usually deals with the scale where quantum properties of the particles are substantial.

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2 answers
1k views

Why do some ionic compounds form in the NaCl structure vs the CsCl structure?

Everything else the same, I'd expect two monoatomic ions to form an ionic structure in the CsCl structure because with more atoms bonded to each atom, it would seem to be more stable. And yet I belie …
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1 vote
1 answer
9k views

$c/a$ ratio for an ideal hexagonal close-packed (HCP) structure [closed]

Show that the $c/a$ ratio for an ideal hexagonal close-packed (HCP) structure is $\left(\frac{8}{3}\right)^\frac{1}{2} = 1.633$. I believe $a$ is the length of $a_1$ and $a_2$. I figured that to be …
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