FORMATION OF SELF-ARRANGING MO CUBES

Previous work suggested that 5 mm Mo cubes, formed from a supersaturat ed vapor, self-organize in the vapor into larger cubes which are 3 x 3 x 3 arrangements of the smaller cubes. Here new experimental results are described that provide an understanding of the narrow size distrib ution necessary for self-arrangement and the observed bcc structure of the particles. An explanation of the cubic shape of the particles and a calculation for the energy decrease due to self-arrangement are als o presented.