方解石の Cleavage Step

• Main Author: 柴田 昇
• Format: Report
• Language: Japanese
• Published: 1968
• Subjects: Iceland
• Online Access: http://hdl.handle.net/10069/16450; https://nagasaki-u.repo.nii.ac.jp/?action=repository_uri&item_id=20494; https://nagasaki-u.repo.nii.ac.jp/?action=repository_action_common_download&item_id=20494&item_no=1&attribute_id=18&file_no=1

The cleavage steps of the calcite crystal (Iceland Spar) were investigated by etching technique and microscopic observation. The sites of the intersection of dislocations with the cleavage surface of the calcite crystal were revealed by etching the surface with dilute nitric acid or nital. It seems that the appearance of the cleavage step is appreciably influenced by cleaving method, and the formation of the elementary step is not always associated with srew dislocations which intersect the cleavage surface. From the variety of the step patterns, secondary cleavage and plastic shearing are considered to be the other prominent mode of the step formation.