160

150

130

110

Pressure (GPa)

Ref. [30]

2.48

2.57

2.07

2.08

λ_opt

Ref. [30]

1124.3

1043.8

1125.1

981.7

ϖ(K)

Equation (7)

184.5

174.5

165.7

144.7

$T_c^{°}$ (K)

Equation (9)

203.5

310.49

255.84

223.45

T_c(K)

Equation (8)

0.49

0.49

0.49

0.49

α

Equation (11)

0.35

0.35

0.33

0.33

α