Refereed Articles
Synthesis, Structure, and Magnetic Properties of Sr39Co12N31
  Single crystals of Sr39Co12N31 have been synthesized in liquid sodium from strontium, cobalt, and sodium azide at 1000°C in sealed niobium ampoules. The structure was solved by single-crystal X-ray diffraction (I m3m (No. 229), a= 14.910 Å, Z=2, R(F)=6.7%, Rw(F)=6.3%) with a disordered strontium position. Sr39Co12N31 has a unique structure type incorporating coalt in linear coordination as isolated nitridometalate ions. All cobalt atoms are crystallographically equivalent, existing with a formal mixed valence of CoI and CoII. The magnetic susceptibility demonstrates antiferromagnetic Curie–Weiss behavior with an effective moment on cobalt of 4.99 mgrB, which lies in the range expected for that of high-spin ground states.  
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  Synthesis, Structure, and Magnetic Properties of Sr39Co12N31.Glen R. Kowach, H. Y. Lin, F. J. DiSalvo, J. Solid State Chem. 1998, 141, 1.