The first crystalline hexagonal Si3N4 microtubes


  • Generous financial support by the Fonds der Chemischen Industrie and the Deutsche Forschungsgemeinschaft (Gottfried Wilhelm Leibniz-program) is gratefully acknowledged.


Hollow, regularly shaped hexagonal Si3N4 microtubes (see Figure) have been synthesized by reaction of cobalt metal with silicon diimide. Some are partially and some completely filled with metallic inclusions, which were identified as Co2Si. The formation of crystalline transparent filaments with non-transparent spherical or polyhedral particles at the tip is also reported.

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