The former is called negative Frank dislocation, While the latter positive 2. Movement of frank partial It can only climb, slip can never occur 3. Practical formation process of Frank Partial A cluster of point defects preferably precipitate on (111 == collapse to form disk of point defects dislocation loopThe former is called negative Frank dislocation, While the latter positive. 2. Movement of Frank Partial 3. Practical formation process of Frank Partial It can only climb, slip can never occur. A cluster of point defects preferably precipitate on {111} ==> collapse to form disk of point defects ==> dislocation loop