Diffusion Pathways: In crystalline materials, the ordered arrangement of atoms or molecules creates well-defined pathways for the diffusion of other species, such as atoms, ions, or molecules. This ordered structure allows for faster and more predictable diffusion because particles can move along specific crystal lattice planes or directions. In amorphous materials, the lack of such order can result in more complex and less predictable diffusion pathways, leading to slower diffusion rates.