Q.

The Miller indices h, k, and l of parallel planes in a BCC lattice should satisfy which of the following X-ray diffraction reflection rules?

A. h + k + l should be even
B. h, k, and l should all be either even or odd
C. h, k, and l should form pythagoras triplet
D. all planes allow reflections view answer
Answer» A. h + k + l should be even
Explanation: if the sum of miller indices becomes odd for a bcc lattice, destructive interference occurs.
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