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Calorimetric study of MgZn2 and Mg2Zn11

  • Masao Morishita EMAIL logo and Koichiro Koyama
Published/Copyright: February 7, 2022
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 94 Issue 9

Abstract

The thermodynamic properties of MgZn2 and Mg2Zn11 were investigated by calorimetry. The standard entropies of formation at 298 K, ΔfS298° were determined from measuring the heat capacities, Cp, from near absolute zero (2 K) to 390 K by the relaxation method. The standard enthalpies of formation at 298 K, ΔfH298° were determined by solution calorimetry in hydrochloric acid solution. The standard Gibbs energies of formation at 298 K, ΔfG298° were determined from these data. The electronic contribution to the heat capacities of MgZn2 and M2Zn11 were found to be similar to pure Zn, indicating that the valence electrons of Mg are trapped by the density of states for Zn in the vicinity of the Fermi level.

Keywords: MgZn2; Mg2Zn11; Calorimetry; Heat capacity; Enthalpy of formation; Gibbs energy of formation
Prof. Masao Morishita Department of Materials Science and Chemistry Himeji Institute of Technology 2167 Shosha, Himeji, 671-2201 Japan Tel.: +81 792 67 4915 Fax: +81 792 66 8868

  1. The authors wish to express their thanks to Mr. K.Yagi, bachelor student of Himeji Institute of Technology, for the cooperative work of the experiment.

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Received: 2003-01-08
Published Online: 2022-02-07

© 2003 Carl Hanser Verlag, München

Articles in the same Issue

  1. Frontmatter
  2. Articles/Aufsätze
  3. Bulk and grain boundary diffusion of Ag in γ-FeNi alloy
  4. Thermodynamics of ordered intermetallic compounds containing point defects
  5. Relationship between the sodium oxide activity of ceramic (Na-β + β″)-alumina and the sodium activity in the ambience of the material
  6. Calorimetric study of MgZn2 and Mg2Zn11
  7. The (γ + γ′)/γ′ phase boundary in the Ni–Al phase diagram from 600 to 1200 °C
  8. Experimental investigation and thermodynamic calculation of ternary Al–Ca–Mg phase equilibria
  9. Texture development in Al alloys during tensile testing
  10. Dispersion strengthening of copper by internal oxidation of rapidly solidified Cu-RE alloys
  11. The effect of Cu and Al on the mechanical properties of gravity-cast hyper-eutectic Zn–Al-based alloys
  12. Hot deformation characteristics of Ti-6Al-4V
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  14. Influence of charged hydrogen on tensile behavior of a pressure vessel steel at relatively high temperatures
  15. The damping behavior of a Ni-50 at.%Ti shape memory alloy
  16. Development of SMD 32.768 kHz tuning fork-type crystals
  17. Investigation of the miscibility gap region in liquid Ga–Pb alloys
  18. Notifications/Mitteilungen
  19. Werner-Köster-Preis 2002
  20. Personal/Personelles
  21. Information
  22. Books/Bücher
  23. Conferences/Konferenzen
https://doi.org/10.1515/ijmr-2003-0176
Keywords for this article
MgZn2; Mg2Zn11; Calorimetry; Heat capacity; Enthalpy of formation; Gibbs energy of formation

Articles in the same Issue

  1. Frontmatter
  2. Articles/Aufsätze
  3. Bulk and grain boundary diffusion of Ag in γ-FeNi alloy
  4. Thermodynamics of ordered intermetallic compounds containing point defects
  5. Relationship between the sodium oxide activity of ceramic (Na-β + β″)-alumina and the sodium activity in the ambience of the material
  6. Calorimetric study of MgZn2 and Mg2Zn11
  7. The (γ + γ′)/γ′ phase boundary in the Ni–Al phase diagram from 600 to 1200 °C
  8. Experimental investigation and thermodynamic calculation of ternary Al–Ca–Mg phase equilibria
  9. Texture development in Al alloys during tensile testing
  10. Dispersion strengthening of copper by internal oxidation of rapidly solidified Cu-RE alloys
  11. The effect of Cu and Al on the mechanical properties of gravity-cast hyper-eutectic Zn–Al-based alloys
  12. Hot deformation characteristics of Ti-6Al-4V
  13. Effect of carbon and nitrogen on the stacking fault energy of high-alloyed iron-based austenite
  14. Influence of charged hydrogen on tensile behavior of a pressure vessel steel at relatively high temperatures
  15. The damping behavior of a Ni-50 at.%Ti shape memory alloy
  16. Development of SMD 32.768 kHz tuning fork-type crystals
  17. Investigation of the miscibility gap region in liquid Ga–Pb alloys
  18. Notifications/Mitteilungen
  19. Werner-Köster-Preis 2002
  20. Personal/Personelles
  21. Information
  22. Books/Bücher
  23. Conferences/Konferenzen
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