An element crystallises in a face–centred cubic (fcc) unit cell with cell edge a. The distance between the centres of two nearest octahedral voids in the crystal lattice is:

Question

An element crystallises in a face–centred cubic (fcc) unit cell with cell edge a. The distance between the centres of two nearest octahedral voids in the crystal lattice is:, a 2, a, 2 a, a 2

MARKS App · Accepted Answer

In FCC octahedral voids are present at the edge centers and body center. Minimum distance between centers of two octahedral voids = x = a 2 2 + a 2 2 = a 2 4 + a 2 4 = a 2

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