TRUE SIZE DISTRIBUTION OF SIMPLE POLYHEDRAL PARTICLES OBTAINED FROM TEM IMAGES OF EXTRACTION REPLICAS

The projected shape and size of anisotropic particles imaged using tra nsmission electron microscopy depends on the particle orientation with respect to the electron beam. To be of most use, the size distributio n of these particles' projected images must be converted to their true three-dimensional size distribution. The means to make such a convers ion from the projected images obtained from extraction replicas is pre sented for particles with a constant aspect ratio randomly oriented in their original matrix.