Abstract
SODIUM NITRIDE, A COMpound that some scientists claimed could not exist, has been prepared and characterized by chemists at the Max Planck Institute for Solid-State Research, Stuttgart, Germany Research chemist Dieter Fischer and chemistry professor Martin Jansen prepared amorphous solid Na 3 N by generating atomic beams of sodium and nitrogen separately in a vacuum chamber and codepositing the atoms onto a liquid-nitrogencooled sapphire substrate [ Angew. Chem. Int. Ed., 41, 1755 (2002)]. The Na 3 N changes to a crystalline form when heated to room temperature and decomposes into its elements at 87 °C. Analysis of X-ray powder diffraction patterns of the crystals reveals that the compound has a lattice structure of the type known as anti-Re0 3 in which octahedra are connected at all six corners to adjacent octahedra to form a three-dimensional network. Six sodium cations are located at the corners and one nitrogen atom is in the center of each octahedron. Sodium nitride is an extremely labile ...
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