Fine particles of Zn, Mn, and Se are produced in a flowing system of argon gas. The experimental geometry is described, and the effect of experimental parameters (metal vapor pressure, gas flow rate, and oxidants) is characterized. These particles are studied using a transmission electron microscope in both imaging and electron diffraction modes. Mn and Zn formed well‐defined crystals as verified by electron diffraction, while Se did not. Even small amounts of oxygen inhibited the proper crystal growth.