SrN and SrN(2): Diazenides by Synthesis under High N(2)-Pressure We thank Dr. D. Többens for support in carrying out the neutron diffraction experiments, the Hahn-Meitner-Institut for giving us access to their high-resolution powder diffractometer E9, B. Bayer, S. Müller, and Dipl.-Chem. U. Schmidt for assistance with the chemical analyses, and Dr. R. Cardoso and S. Hückmann for recording the X-ray data