Russian Journal of Inorganic Chemistry

, Volume 63, Issue 3, pp 361–363 | Cite as

Synthesis and High-Temperature Heat Capacity of Y2Ge2O7

  • L. T. Denisova
  • L. A. Irtyugo
  • Yu. F. Kargin
  • V. V. Beletskii
  • V. M. Denisov
Physical Methods of Investigation


Yttrium germanate Y2Ge2O7 was prepared by solid-phase synthesis from a stoichiometric Y2O3–GeO2 mixture under multistage calcination in air within a temperature range of 1273–1473 K. The molar heat capacity of polycrystalline samples was measured by differential scanning calorimetry (DSC), and the C P = f(T) dependence was used to calculate the thermodynamic properties of yttrium digermanates, such as the enthalpy and entropy changes and the reduced Gibbs energy.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    E. M. Levin, J. Am. Ceram. Soc. 57, 189 (1974).CrossRefGoogle Scholar
  2. 2.
    I. A. Bondar’, N. V. Vinogradova, L. I. Dem’yanets, et al., Chemistry of Rare Elements: Rare-Earth Compounds: Silicates, Germanates, Phosphates, Arsenates, and Vanadates (Nauka, Moscow, 1983) [in Russian].Google Scholar
  3. 3.
    U. W. Becker and J. Felsche, J. Less-Common Met. 128, 269 (1987).CrossRefGoogle Scholar
  4. 4.
    G. J. Redhammer, G. Roth, and G. Amthauer, Acta Crystallogr., Sect. C 63, i93 (2007).CrossRefGoogle Scholar
  5. 5.
    H. Wang, A. Chroneos, A. Dimoulas, et al., Phys. Chem. Chem. Phys. 14, 14630 (2012).CrossRefGoogle Scholar
  6. 6.
    L. N. Dem’yanets, A. N. Lobachev, and G. A. Emel’-chenko, Rare-Earth Germanates, Ed. by N. V. Belov (Nauka, Moscow, 1980) [in Russian].Google Scholar
  7. 7.
    F. Zhao, P. Guo, G. Li, et al., Mater. Res. Bull. 38, 931 (2003).CrossRefGoogle Scholar
  8. 8.
    V. B. Glushkova, I. A. Davtyan, and E. K. Keler, Izv. Akad. Nauk SSSR, Ser. Neorg. Mater. 3, 119 (1967).Google Scholar
  9. 9.
    L. T. Denisova, L. G. Chumilina, and V. M. Denisov, Phys. Solid State 56, 2387 (2014).CrossRefGoogle Scholar
  10. 10.
    L. T. Denisova, L. G. Chumilina, and V. M. Denisov, Phys. Solid State 56, 1055 (2015).Google Scholar
  11. 11.
    V. M. Denisov, L. T. Denisova, L. A. Irtyugo, et al., Phys. Solid State 52, 1362 (2010).CrossRefGoogle Scholar
  12. 12.
    R. C. Reid, J. M. Prausnitz, and T. K. Sherwood, The Properties of Gases and Liquids (McGraw-Hill, New York, 1977).Google Scholar
  13. 13.
    C. G. Maier and K. K. Kelley, J. Am. Chem. Soc. 54, 3243 (1932).CrossRefGoogle Scholar

Copyright information

© Pleiades Publishing, Ltd. 2018

Authors and Affiliations

  • L. T. Denisova
    • 1
  • L. A. Irtyugo
    • 1
  • Yu. F. Kargin
    • 2
  • V. V. Beletskii
    • 1
  • V. M. Denisov
    • 1
  1. 1.Siberian Federal UniversityInstitute of Non-Ferrous Metals and Material ScienceKrasnoyarskRussia
  2. 2.Baikov Institute of Metallurgy and Material ScienceRussian Academy of SciencesMoscowRussia

Personalised recommendations