Fig. 2: H-bonding regimes in NaCl-bearing bcc ice at 1600 K. | Nature Communications

Fig. 2: H-bonding regimes in NaCl-bearing bcc ice at 1600 K.

From: Stability of high-temperature salty ice suggests electrolyte permeability in water-rich exoplanet icy mantles

Fig. 2

a Pressure dependence of the shortest O-H bond length. For a given NaCl concentration, OH reaches a maximum at the transition towards ice X. See text for more details. b OH-rotation rates (dots) and H-translation rates (squares) under compression in salty ice. c H diffusion coefficients (\({D}_{H}\)). The inset represents a zoom in the 30–100 GPa pressure range showing the increasing pressure of the onset of diffusion with increasing NaCl content. When non-visible error bars are smaller than the size of the markers. d Stereographic projection of the density distribution of O-H bond orientations in ice X. In pure and salty, the four maxima corresponds to the \(\left\langle 111\right\rangle\) directions as expected for O-H bonds aligned with the half-diagonals of the bcc sub-lattice. In salty ice the orientation distribution of the O-H bonds is broader than in pure ice, indicating that H atoms tends to delocalize more out of the 〈111〉 direction (OO axis) than in pure ice. The color scale is the same for the two distributions and the white lines contours the same density of O-H bond orientations.

Back to article page