S/N

Temperature, T (K)

T−1 × 10−4 (K−1)

k × 10−5

ln k

1

823

12.15

1.3393

−11.22

2

873

11.45

2.0976

−10.77

3

923

10.83

2.5740

−10.57

4

1023

9.78

3.1761

−10.36