Skip to main content
SpringerLink
Log in

A Thermal And Structural Study on Lanthanum Hexacyanocobaltate(III) Pentahydrate. Part II

  • Published:
Journal of Thermal Analysis and Calorimetry Aims and scope Submit manuscript

Abstract

The thermal dehydration of La[Co(CN)6]⋅5H2O proceeded through at least three stages from the temperature range of30~230°C, and an abrupt mass loss occurred around 350°C and the perovskite type oxide,LaCoO3 was obtained at 1000°C.

After dehydration, the color of the anhydride changed from white to pale blue around 230°C and furthermore, the color changed to blue around 290°C. These color changes were discussed on the basis of the changes of coordination structures around Co ions.

In La[Co(CN)6]⋅5H2O, Co3+ ions lie at the center of the Oh crystal field consisted of six CN– ions. However, in the pale blue specimen, Co3+ ions were situated in the center of D4h crystal field which was distorted the Oh one by lengthening of the trans CN– ions along z-axis. In the blue specimen, Co3+ ions were reduced to Co2+ ions which were situated in the Td crystal field formed by four CN–ions as [Co(CN)4]2–.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  1. H. Yokobayashi, Netusokutei, 18 (1991) 157.

    CAS  Google Scholar 

  2. Y. Masuda, K. Nagaoka, H. Ogawa, O. Nakazato, Y. Yukawa and H. Miyamoto, J. Alloys Comp., 235 (1996) 23.

    Article  CAS  Google Scholar 

  3. Y. Masuda, K. Kikuchi, Y. Yukawa and H. Miyamoto, J. Alloys Comp., 260 (1997) 70.

    Article  CAS  Google Scholar 

  4. Y. Masuda, Y. Seto, X. Wang, Y. Yukawa and T. Arii, J. Therm. Anal. Cal., 60 (2000) 1033.

    Article  CAS  Google Scholar 

  5. H. Adachi, Materials Transcations, 38 (1997) 485.

    CAS  Google Scholar 

  6. D. F. Mullica, W. O. Milligan and W. T. Kouba, J. Inorg. Nucl. Chem., 41 (1979) 967.

    Article  CAS  Google Scholar 

  7. J. Fujita and Y. Shimura, Bull. Chem. Soc. Jpn., 36 (1963) 1281.

    CAS  Google Scholar 

  8. The Chemical Society of Japan (Ed.), Kagaku Binran Kisohen II (Handbook of Chemistry), 4th Ed., Maruzen, Tokyo 1993, p. 607.

  9. P. K. Gallagher and B. Prescott, Inorg. Chem., 9 (1970) 2510.

    Article  CAS  Google Scholar 

  10. K. Sone and Y. Fukuda, Inorganic Thermochromism, Springer-Verlag, 1987, p. 13.

Download references

Author information

Authors and Affiliations

  1. Department of Environmental Science, Faculty of Science, Niigata University, t2-8050 Ikarashi, Niigata, 950-2181, Japan

    Y. Masuda

  2. Graduate School of Science and Technology, Niigata University, 2-8050 Ikarashi, Niigata, 950-2181, Japan

    Y. Seto & X. Wang

  3. Department of Physics, Faculty of Science, Niigata University, 2-8050 Ikarashi, Niigata, 950-2181, Japan

    Y. Tuchiya

Authors
  1. Y. Masuda
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. Y. Seto
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. X. Wang
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. Y. Tuchiya
    View author publications

    You can also search for this author in PubMed Google Scholar

Rights and permissions

Reprints and permissions

About this article

Cite this article

Masuda, Y., Seto, Y., Wang, X. et al. A Thermal And Structural Study on Lanthanum Hexacyanocobaltate(III) Pentahydrate. Part II. Journal of Thermal Analysis and Calorimetry 64, 1045–1051 (2001). https://doi.org/10.1023/A:1011551803301

Download citation

  • Issue Date:

  • DOI: https://doi.org/10.1023/A:1011551803301

Search

Navigation