] ] hydrogen clathrate hydrate
] anyone know what the chemical symbol for this would be?
It doesn't have one that would be particularly meaningful.
Basically, clathrate describes a class of materials where a gas is disolved in water, and the water molecules in the mixture form a complex repeating latice structure that has cavities that look a lot like buckminsterfullerine (buckyballs). The gas sits in those cavities.
So what they're saying is under low temp and high pressure, they can force this mixture into a very specific ice that has property that it holds on to the hydrogen really well.