Salt- and gas-filled ices under planetary conditions

Area of Science:

• Solid-state chemistry
• Materials science
• Planetary science

Background:

• Solid water (ice) can incorporate guest species like gases and ions.
• These filled ice structures are stable at high pressures (tens of Gigapascals) and temperatures (hundreds of Kelvins).
• Guest species significantly alter ice properties, including density, vibrations, diffusion, and conductivity.

Purpose of the Study:

• To review experimental and simulation findings on salt- and gas-filled ices.
• To discuss the unusual properties and dynamical phenomena of these ices.
• To explore their relevance for modeling planetary interiors.

Main Methods:

• Experimental investigations of ice structures under high pressure and temperature.
• Molecular dynamics simulations to study ice behavior.
• Analysis of structural, vibrational, diffusive, and conductive properties.

Main Results:

• Demonstration of stable gas- and salt-filled ice structures under extreme conditions.
• Observation of modified physical and chemical properties due to guest species.
• Discovery of unexpected dynamical phenomena in these exotic ice forms.

Conclusions:

• Filled ices represent a significant class of materials with tunable properties.
• These findings have critical implications for understanding planetary interiors.
• Further research into ice physics and chemistry is essential for diverse applications.