March 29, 2024, 04:47:46 AM
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Topic: face centred cubic  (Read 2428 times)

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Offline luketapis

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face centred cubic
« on: August 12, 2012, 03:35:05 PM »
A metal crystallises in the face centred cubic (fcc) system and the edge of the unit
cell is 503 pm. Calculate the atomic radius of the metal.

Ok, so It is not so difficult, but I have one question. In primitive cubic r=1/2 d (d-diagonal of cubic) because there is 1 atom in cubic, in bcc r=1/4 d, but what is r in fcc?

Offline Sophia7X

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Re: face centred cubic
« Reply #1 on: August 12, 2012, 08:33:37 PM »
Check out the explanation for problem 1. http://www.chemteam.info/Liquids&Solids/WS-fcc-AP.html
Entropy happens.

Offline luketapis

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Re: face centred cubic
« Reply #2 on: August 12, 2012, 08:46:46 PM »
thanks Sophia

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