Potassium azide decomposition - 1 / Разложение азида калия - 1 HD

I tried decomposed a bit of potassium azide in a test tube, a quartz cylinder and on the metal strip. Potassium azide decomposition occurs with the formation of metallic potassium and nitrogen. Alcohol lamp flame was not enough, so I use a hot flame of a gas burner. Initially, potassium azide quietly melts. Then suddenly appear green vapors and potassium droplets on the walls. The most beautiful vapors of potassium. At the same time there is an adverse reaction: potassium nitride is formed. In the decomposition process can be clearly seen yellow-brown nitride film. http://chemistry-chemists.com/N6_2016/ChemistryAndChemists_6_2016-P11-1.html