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A neutron diffraction study of Cr3(11B0.44C0.56)C0.85 and Cr3C(C0.52N0.48)*
Published/Copyright:
August 25, 2010
Abstract
The crystal structures of Cr3(C,N)2 and Cr3(B,C)2 were refined from neutron powder diffraction data using the Rietveld profile analysis method. In both cases nonmetal ordering was established (space group Cmcm; Z = 4, Re3B-type structure); the smaller nonmetal atoms prefer occupation of the octahedral interstices of the metal host lattice. Whereas occupation of the octahedral voids was complete for Cr3C (C0.52N0.48), a small vacancy formation was observed for Cr3(B0.44C0.56)C0.85. The obtained reliability values for the refinement were R = 0.072 for Cr3(B,C)2 and R = 0.057 for Cr3(C,N)2. The structural chemistry of filled Re3B-type compounds is discussed.
Published Online: 2010-08-25
Published in Print: 1982
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- Site occupancy refinement of osumilite
- X-ray charge density study of rutile (TiO2)
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