Table 1 Thermodynamic properties of the solid solutions reported in this work.

From: Is configurational entropy the main stabilizing term in rock-salt Mg0.2Co0.2Ni0.2Cu0.2Zn0.2O high entropy oxide?

Ν

χCuO

χ2

χ3

χ4

χ5

SConfig

TSConfig (kJ mol−1) at 1000 °C

TSConfig (kJ mol−1) at 850 °C

TSConfig (kJ mol−1) at 800 °C

\(\triangle {G}_{{CuO},{ZnO}}^{{phase\; transition}}\) (kJ mol−1)

2

0.2

0.8

   

0.5 R

5.3

4.7

4.5

5.0

3

0.2

0.2

0.6

  

0.95 R

10.1

8.9

8.5

9.4

4

0.2

0.2

0.2

0.4

 

1.33 R

14.1

12.4

11.9

9.4

5

0.2

0.2

0.2

0.2

0.2

1.61 R

17.1

15.1

14.4

9.4

  1. χi is the molar fraction of the i-th component, N is the total number of components, and SConfig is the corresponding configurational entropy. Values of the product TSConfig are given at some selected temperatures and the overall \(\triangle {G}_{{CuO},{ZnO}}^{{phase\; transition}}\) of the structural transitions from tenorite and wurtzite to rock-salt is reported in the last column.
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