Question

Three lines are drawn from a single corner of a FCC unit cell to meet the other corner such that they are found to pass through exactly only 1 octahedral void, no voids of any type and exactly 2 tetrahedral voids with 1 octahedral void. Identify the line in the same order.

• A. Edge, Face diagonal, Body diagonal
• B. Face diagonal, Edge, Body diagonal
• C. Body diagonal, Face diagonal, Edge
• D. Edge, Body diagonal, Face diagonal

Answer 1

The correct option is A Edge, Face diagonal, Body diagonal


Along the edge, there is only one octahedral void.
Along the face diagonal, there is no void.
Along the body diagonal, there is two tetrahedral voids and one octahedral void.