An Electron Microscope and Electron Diffraction Study of Fine Smoke Particles Prepared by Evaporation in Argon Gas at Low Pressures (II)

This paper forms a continuation of the previous paper of almost the same title (Kimoto et al. , Japan. J. appl. Phys. 2 (1963) 702). The materials examined include all the metals studied in the previous paper, Mg, Al, Cr, Mn, Fe, Co, Ni, Cu, Zn, Ag, Cd, Sn, Au, Pb and Bi plus the five elements, Be, Ga, Se, In and Te which have been newly added. One of the advances in the present study is the improved purity of the argon used. Thus, beautiful crystal habits have been observed for many of the elements. A small amount of oxygen, for example 0.03 mm Hg of oxygen in 6 mm Hg of argon, caused remarkable deterioration in the crystal habit of the particles. New modifications of crystal structure were found among the particles of chromium aud manganese. A few of the previous results are corrected because they were found to be due to impurities in the argon.