//JPL		o-NH3
//Temp (K)	log(Z)
2.375	0.6021
5.000	0.6074
9.375	0.6668
18.75	0.8489
37.50	1.1571
75.00	1.5749
150.0	2.0169
225.0	2.2791
300.0	2.4689		