First posted September 8, 2023 For additional information, contact: Earthquake Science CenterU.S. Geological Survey350 N. Akron RoadMoffett Field, CA 94035 The U.S. Survey (USGS) Clathrate Hydrate Properties Project, active from 1993 to 2022 in Menlo Park, California, stemmed an earlier project on the properties of planetary ices supported by National Aeronautics and Space Administration’s (NAS...

Ab initio molecular dynamics (AIMD) results on a krypton-water liquid solution are presented and compared to recent XAFS results for the radial hydration structure for a Kr atom in liquid water solution. Though these AIMD calculations have important limitations of scale, the comparisons with the liquid solution results are satisfactory and significantly different from the radial distributions e...

Abstract Clathrate hydrates—also known as gas hydrates—are ice-like compounds consisting of and water molecules. They occur wherever elevated pressures low temperatures prevail; where enough hydrate-forming molecules are available. Therefore, natural hydrates at all active passive continental margins, in permafrost regions, some deep lakes, under unfavorable circumstances, also, pipelines. This...

Methane is widespread in the Universe, and its occurrence intimately connected with that of water, often as clathrate hydrate, likely priority form which methane stored icy moons, water-rich exoplanets but also depths Earth’s oceans. Arrangement stability range crystalline structures, decomposition conditions, miscibility resulting dense fluid mixtures are crucial for modeling static dynamic pr...

Hydrocarbons such as methane and ethane are present in many solar system objects, including comets, moons planets. The interaction of these hydrocarbons with water ice at low temperatures could lead to the formation inclusion compounds, clathrate hydrates (water based host cages trapping guest molecules), modifying their retention, stability therefore evolution. occurrence on surfaces be establ...