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Fig. 5


Absorbance of pure and mixed ices between 2750 and 3400 cm-1 at 55 K for 1 micron thickness layers. On the left: amorphous phase of pure CH3OH (black), almost pure H2O (blue) and mixtures of both with CH3OH:H2O mixing ratio of 20:80 (red) and 48:52 (dash-point). On the right: ices are in crystalline phase and the same legend is used. The synthetic spectrum of a 48:52 mixing ratio obtained from pure methanol and water ices is plotted as a dotted line. (The color version is available in the electronic version.)

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