Metals with the bcc structure (Li, Na, K, Rb, Cs and Ba) have been condensed onto substrates kept at the liquid helium or nitrogen temperature by vacuum evaporation, and their structures have been studied by transmission electron diffraction. It has been found that none of these films are in an amorphous state, and that the films of alkali metals (Li, Na, K, Rb and Cs) contain a small quantity of crystallites of the hop structure besides those of the bcc structure.
Science reports of the Research Institutes, Tohoku University. Ser. A, Physics, chemistry and metallurgy 21 66-66, 1969