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**The number of lattice point in FCC???**

Hi, I am having a trouble to figure the number of lattie point in FCC structure out. My text book said simple cubic has 1 lattice point, BCC has 2 points, and FCC has 4 points. However there is no further explaination or figures. I am a kind of understand about the simple cubic structure since the atom on every corner is the lattice point.

Can you guys explain that how the lattice points in FCC and BCC are 4 and 2?

Thanks.