Estimated values for C2H6 from the polynomial in:
Fray, N., and B. Schmitt 2009.  Sublimation of ices of astrophysical
interest: A bibliographic review.  Planet. Space Sci. 57, 2053-2080.
T(K)     P(bar)
55.00   1.59e-13
56.00   3.66e-13
57.00   8.15e-13
58.00   1.77e-12
59.00   3.73e-12
60.00   7.67e-12
61.00   1.54e-11
62.00   3.03e-11
63.00   5.81e-11
64.00   1.09e-10
65.00   2.02e-10
66.00   3.66e-10
67.00   6.51e-10
68.00   1.14e-09
69.00   1.96e-09
70.00   3.32e-09
71.00   5.53e-09
72.00   9.09e-09
73.00   1.47e-08
74.00   2.36e-08
75.00   3.72e-08
76.00   5.81e-08
77.00   8.96e-08
78.00   1.37e-07
79.00   2.06e-07
80.00   3.07e-07
81.00   4.54e-07
82.00   6.64e-07
83.00   9.63e-07
84.00   1.38e-06
85.00   1.97e-06
86.00   2.78e-06
87.00   3.89e-06
88.00   5.41e-06
89.00   7.46e-06
90.00   1.02e-05
