e_i

e_r

K*10⁻⁴

n

α × 10⁴(cm)⁻¹

T_s (K)

0.025

1.511

105

1.2295

2.614

300

0.02

1.41

84

1.187

2.126

325

0.018

1.384

79

1.176

2

350

0.027

1.552

11

1.246

2.806

400

0.0139

1.291

61

1.136

1.539

450