https://en.wikipedia.org/wiki/Crystallographic_defect
Crystalline solids exhibit a periodic crystal structure. The positions of atoms or molecules occur on repeating fixed distances, determined by the unit cell parameters. However, the arrangement of atoms or molecules in most crystalline materials is not perfect. The regular patterns are interrupted by crystallographic defects.
Three-dimensional macroscopic or bulk defects,
such as pores, cracks, inclusions
high-magnification optical micrograph showing intergranular cracks with characteristic
manganese sulfide and oxide inclusions in the crack path of a section
across the radial cracks in the heat-treated part
Hydrogen Embrittlement Cracking in a Batch of Steel Forgings
cracks and inclusions bulk defects in 3d, created via BLC Blender addon
the diamond seed from a diamond grinding wheel in 3d (10000000:1cm), bulk defect – inclusions, created via BLC Blender addon
the diamond seed from a diamond grinding wheel video, created via BLC Blender addon
atomic steps planar defect post-effect
atomic steps, planar defect, microscopy-analysis.com
steps between atomically flat terraces, planar defect in 3d, created via BLC Blender addon
steps between atomically flat terraces, planar defect in 3d, created via BLC Blender addon
voids, bulk defects
flat void and octahedron void, bulk defects in 3d, created via BLC Blender addon