Measured data for alpha CO from:
Shinoda, T. 1969.  Vapor pressure of carbon monoxide in condensed phases.  Bull. Chem. Soc. Japan 42, 2815-2820.
T(K)     P(bar)
54.78   6.05e-03
55.36   6.96e-03
55.93   8.28e-03
56.48   9.73e-03
57.02   1.14e-02
57.55   1.32e-02
58.07   1.51e-02
58.58   1.75e-02
59.12   2.03e-02
59.93   2.52e-02
60.49   2.92e-02
61.03   3.35e-02
