A new method for the synthesis of chromium(IV) oxide at ambient pressure†

(Note: The full text of this document is currently only available in the PDF Version )

K. Ramesha and J. Gopalakrishnan


Abstract

The reaction CrO3 + 2NH4X → CrO2 + 2 NH3 + H2O + X2 (X = Br, I), which occurs quantitatively at 120–150 °C, provides a convenient method for the synthesis of CrO2; unlike conventional methods, the method reported here does not require the use of high pressure for the synthesis of this technologically important material.


References

  1. D. B. Rogers, R. D. Shannon, A. W. Sleight and J. L. Gillson, Inorg. Chem., 1969, 8, 841 CrossRef CAS.
  2. B. L. Chamberland, CRC Crit. Rev. Solid State Mater. Sci., 1977, 7, 1 Search PubMed.
  3. K. P. Kämper, W. Schmitt, G. Güntherodt, R. J. Gambino and R. Ruf, Phys. Rev. Lett., 1987, 59, 2788 CrossRef.
  4. R. J. Soulen Jr., J. M. Byers, M. S. Osofsky, B. Nadgorny, T. Ambrose, S. F. Cheng, P. R. Broussard, C. T. Tanaka, J. Nowak, J. S. Moodera, A. Barry and J. M. D. Coey, Science, 1998, 282, 85 CrossRef.
  5. H. Y. Hwang and S.-W. Cheong, Science, 1997, 278, 1607 CrossRef CAS.
  6. B. L. Chamberland, Mater. Res. Bull., 1967, 2, 827 CAS.
  7. V. Bhat and J. Gopalakrishnan, J. Chem. Soc. Chem. Commun., 1986, 1644 RSC.
  8. J. Bassett, R. C. Denney, G. H. Jeffery and J. Mendham, Vogel's Textbook of Quantitative Inorganic Analysis, Longman, London, 4th edn., 1978, p. 51 Search PubMed.
  9. JCPDS-International Centre for Diffraction Data Card No. 43–1040.
Click here to see how this site uses Cookies. View our privacy policy here.