The interplanar spacing dhkl for planes in a unit cell having orthorhombic geometry is given by

where a, b, and c are the lattice parameters.
(a) To what equation does this expression reduce for crystals having cubic symmetry?
(b) For crystals having tetragonal symmetry?

Transcribed Image Text:

<0.30 nm>| 0.25 nm 0.20 nm (110) (101) (011) 0.39 nm K-0.32 nm> K-0.36 nm