Skip to main content
Log in

Phase transformations in the Nd-Mn-O system

  • Published:
Inorganic Materials Aims and scope

Abstract

The sequence of phase transformations responsible for the dissociation of the compounds NdMn2O5 and NdMnO3 in the Nd-Mn-O system has been identified by a static technique at a reduced oxygen pressure in combination with thermal analysis and high-temperature X-ray diffraction. We have mapped out the p-T-x (oxygen pressure-temperature-composition) phase diagram of the Nd-Mn-O system and determined the thermodynamic characteristics of formation of the compounds NdMn2O5 and NdMnO3 from their constituent elements.

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

Access this article

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

Instant access to the full article PDF.

Similar content being viewed by others

References

  1. Dabrowski, B., Kolesnic, S., Baszczuk, A., et al., Structural, transport and magnetic properties of RMnO3 perovskites (R = La, Pr, Nd, Sm, Eu, Dy), J. Solid State Chem., 2005, vol. 178, pp. 629–637.

    Article  CAS  Google Scholar 

  2. Alonso, J.A., Martinez-Lope, M.J., and Casais, M.T., Evolution of the Jahn-Teller distortion of MnO6 octahedra in RMnO3 perovskites (R = Pr, Nd, Dy, Tb, Ho, Er, Y); a neutron diffraction study, J. Inorg. Chem., 2000, vol. 39, pp. 917–923.

    Article  CAS  Google Scholar 

  3. Cherepanov, V.A., Phase equilibria and defect structure of mixed oxides in the Ln(La,Pr,Nd)-Me(Ca,Sr,Ba)-T(Mn,Co,Ni)-O systems, Doctoral (Chem.) Dissertation, Yekaterinburg, 2001.

    Google Scholar 

  4. Yankin, A.M., Balakirev, V.F., Fedorova, O.M., and Golikov, Yu.V., Manganity redkozemel’nykh i shchelochno-zemel’nykh elementov. Fiziko-khimicheskii analiz (Physicochemical Analysis of Rare-Earth and Alkaline-Earth Manganites), Yekaterinburg: Ural. Otd. Ross. Akad. Nauk, 2009.

    Google Scholar 

  5. Cherepanov, V.A., Barchatova, L.Yu., and Petrov, A.N., Phase equilibria in the Ln-Mn-O system (Ln = Pr, Nd) and general aspects of the stability of the perovskite phase LnMeO3, J. Phys. Chem. Solids, 1994, vol. 55, no. 3, pp. 229–235.

    Article  CAS  Google Scholar 

  6. Atsumi, T., Ohgushi, T., and Kamegashira, N., Studies on oxygen dissociation pressure of LnMnO3 (Ln = rare earth) with the e.m.f. technique, J. Alloys Compd., 1996, vol. 238, pp. 35–40.

    Article  CAS  Google Scholar 

  7. Kamegashira, N., Miyazaki, Y., and Hiyoshi, Y., Oxygen dissociation pressure of NdMnO3, Mater. Chem. Phys., 1984, vol. 10, pp. 299–304.

    Article  CAS  Google Scholar 

  8. Satoh, H., Suzuki, S., Yamamoto, K., and Kamegashira, N., Phase stabilities of LnMn2O5 (Ln = rare earth), J. Alloys Compd., 1996, vol. 234, pp. 1–5.

    Article  CAS  Google Scholar 

  9. Portnoi, K.I. and Timofeeva, N.I., Kislorodnye soedineniya redkozemel’nykh elementov (Rare-Earth Oxide Compounds), Moscow: Metallurgiya, 1986.

    Google Scholar 

  10. Kasper, N.V. and Troyanchuk, I.O., Study of Jahn-Teller phase transitions in nonstoichiometric RMnO3 + x orthomanganites (R = La, Nd, Sm, Eu), J. Phys. Chem. Solids, 1996, vol. 57, no. 11, pp. 1601–1607.

    Article  CAS  Google Scholar 

  11. Troyanchuk, I.O., Magnetic properties of the Nd0.9MnOx cation-deficient manganites, Phys. Solid State, 2006, vol. 48, no. 5, pp. 898–903.

    Article  CAS  Google Scholar 

  12. Tret’yakov, Yu.D., Khimiya nestekhiometricheskikh okislov (The Chemistry of Nonstoichiometric oxides), Moscow: Mosk. Gos. Univ., 1974.

    Google Scholar 

Download references

Author information

Authors and Affiliations

Authors

Corresponding author

Correspondence to L. B. Vedmid’.

Additional information

Original Russian Text © L.B. Vedmid’, A.M. Yankin, O.M. Fedorova, V.M. Kozin, 2015, published in Neorganicheskie Materialy, 2015, Vol. 51, No. 3, pp. 338–343.

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Vedmid’, L.B., Yankin, A.M., Fedorova, O.M. et al. Phase transformations in the Nd-Mn-O system. Inorg Mater 51, 288–293 (2015). https://doi.org/10.1134/S002016851502017X

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1134/S002016851502017X

Keywords

Navigation