Figure 8
(a) Refined phase fractions of MS9, MS11 and ice as a function of time from X-ray powder diffraction data measured on a Peltier-cooled cold stage with ca 52 cm3 head-space over the sample. The solid line through the symbols for MS11 reports the fit of equation (5) to the data. The two dashed lines show the expected phase fractions of ice and MS9 concomitant with the observed abundance of MS11 as a function of time. (b) Refined phase fractions of deuterated MS9, MS11 and ice as a function of time from neutron powder diffraction data measured in an indium-sealed container. Lines and symbols have the same meaning as in part (a). |