Synthesis and characterization of the oxynitride pyrochlore - Sm2Mo2O3.83N3.17

G. M. Veith, M. Greenblatt, M. Croft, J. B. Goodenough

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28 Scopus citations

Abstract

Sm2Mo2O3.83N3.17, the first molybdenum oxynitride pyrochlore, was synthesized by heating the Sm2Mo2O7 pyrochlore in flowing ammonia at 625°C for 24 hours. Sm2Mo2O3.83N3.17 forms with the cubic pyrochlore structure, space group Fd3m (a = 10.4975 Å). The sample is semiconducting and the temperature-dependent magnetic susceptibility follows Curie-Weiss behavior. X-ray absorption near-edge spectroscopy measurements indicate that in the oxynitride, molybdenum has a formal oxidation state significantly larger than 4+.

Original languageEnglish
Pages (from-to)1521-1530
Number of pages10
JournalMaterials Research Bulletin
Volume36
Issue number7-8
DOIs
StatePublished - May 6 2001
Externally publishedYes

Funding

The authors would like to thank K.V. Ramanujachary for his critical reading of this manuscript. G. Veith would like to thank Barbara McKernan for her editorial help, as well as the U.S. Department of Education and the Rutgers University Chemistry Department for his GAANN fellowship. This research was supported by the NSF-Solid State Chemistry Grant DMR 99–07963.

Keywords

  • A. Nitrides
  • B. Chemical synthesis
  • C. XANES
  • D. Electrical properties
  • D. Magnetic properties

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