Identify the structure of each of the two unit cells shown in Pro...

Question

Identify the structure of each of the two unit cells shown in Problem 48 as the rock salt structure, zinc blende structure, fluorite structure, antifluorite structure, or none of these.

Accepted Answer

hey everyone. So today we're being asked to label each of the unit cells with the proper structure. So taking a look at the first one, we have corners where we have atoms that are lined up on the corners and edges. But the caveat is that they're all uniquely or evenly spaced out. And due to this uh uniform similarity, uniform crystallization almost, it is akin to something like table salt and A. C. L. Which has a uniform crystal structure as such. This type of structure, this uniformity that we see here is the rock salt structure. It is the rock salt structure. That's how you spell it structure. Taking a look at the second unit cell, it starts off similar, we have eight Atoms in All Corners. We also have some atoms, specifically six atoms in the Let me use green to depict those. We also have six atoms in each of the faces, but any atoms within the molecule itself and the atoms within the molecule. These purple ones here are sort of haphazardly strewn about as such. It can remind us sort of of a zinc structure. So we'll say that this is a zinc blend structure blend structure. Not to be confused with a sulfide, like zinc sulfide, which would also have a uniform crystal structure, like a rock salt structure structure, which leaves us with our final Our final structure which has eight corner atoms. Six face Adams, six face Adams And then finally one lone central atom. And this is a textbook definition of the province kite structure, the power of skype structure, which is typically defined by a unit cell that has a single central um central atom. Prov skate structure. Therefore, we have identified the structures for each of the unit cells. So I hope this helps, and I look forward to seeing you all in the next one.

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