Do solids diffuse?

Answer:
The answer is yes. The classic experiment is the diffusion of solid gold into solid lead. The first reference below, from Nature in 1925, discusses this phenomenon and suggests that the rate of diffusion is about 100,000 times slower than the rate of diffusion of sodium chloride in water. I have given some other more modern references.
Contributor: Rattanjot
First answer by ID3177488917. Last edit by Rattanjot Singh. Contributor trust: 0 [recommend contributor recommended]. Question popularity: 2 [recommend question].