In a hypothetical solid, 'C' atoms form CCP lattice. 'A' atoms occupy all tetrahedral voids and 'B' atoms occupy all octahedral voids, without disturbing the crystal. If a unit cell of the crystal is

Question

In a hypothetical solid, 'C' atoms form CCP lattice. 'A' atoms occupy all tetrahedral voids and 'B' atoms occupy all octahedral voids, without disturbing the crystal. If a unit cell of the crystal is cut by a plane shown in the figure, then the cross section of this plane looks like

Prashant Kotian · Accepted Answer

Correct answer: C. The shaded cutting diagonal plane passes through 4 corners of the unit cell, 2 face centers, 1 body center (octahedral void occupied by B), and 4 tetrahedral voids (occupied by A). This cross-section corresponds to Option (c).

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