Fig. 4: Low-temperature dehydration kinetics.
From: Dehydration of a crystal hydrate at subglacial temperatures
Plot of the total dehydration times ttot (green, left ordinate) and Rwr (black, right ordinate) as a function of temperature for a single crystal of length 272 μm along [001]. The dashed lines correspond to the Arrhenius fit of the data points. The dotted vertical line indicates the estimated value of Ton. Insets: Top, Arrhenius fit of the zero-order reaction model of channel emptying in T1. The least squares regression line of best fit is shown in red. Bottom, magnified temperature range, as indicated by the green rectangle, for ttot as a function of temperature. The cross indicates ttot at 0 °C. Notably, the observed ttot at −60 °C is larger than that predicted by the Arrhenius parameters. However, this is not surprising considering that the onset of geometric frustration occurs at this temperature. Note that the kinetic data presented here are relevant to the crystal used, and would vary depending on the size of the crystal34. Error bars represent the standard error of the mean of three measurements.
