Principle of cleavage
The formation of cleavage is mainly restricted by the crystal structure and composition.
The main reasons are summarized in five points:
The direction of the electrically neutralized surface of the parallel crystal structure, such as sphalerite (110).
The direction of the surface mesh with the highest surface mesh density in the parallel crystal structure, such as stone salt (100).
The direction of the facet with the largest facet spacing in the parallel crystal structure, such as stone salt (100).
The direction of the surface network adjacent to the ions of the same number in the parallel crystal structure (repelled by the opposite sex), such as fluorite (111).
The direction of the surface net with the strongest chemical bonding force in the parallel crystal structure, such as graphite (0001).