APPLICATION OF ELECTRON HOLOGRAM TO MORPHOLOGICAL ANALYSIS OF SPINDLE-TYPE HEMATITE PARTICLES

In order to investigate morphology of spindle-type hematite (alpha-Fe2 O3) particles, electron holograms were observed with imaging plates us ing a transmission electron microscope (TEM) equipped with a field emi ssion gun and a biprism. Crystal thickness estimated by the shift of i nterference fringes agrees well with the value expected from the shape of the particle. Furthermore, local fluctuation of the interference f ringes due to the particle morphology indicates the fluctuation of abo ut 18 nm. These results clearly demonstrate that observation of hologr ams with new recording systems such as imaging plates is promising to characterize the detailed morphology of small particles.