http://www.newscientist.com/channel/fundamentals/mg19225764.200-ice-steam-liquid-and-now-a-new-type-of-water.html
"This is a novel material, uniquely different from water," says David Mao, a team member at the Carnegie Institution in Washington DC. "It is very energetic, but stable and does not react back to form water when kept at high pressure."
Once synthesised, the alloy can be stored for over 120 days at temperatures up to 400 °C when kept at high pressure. The team is now characterising the properties of the alloy and Mao suggests that the material could be used as a way of storing and transporting hydrogen for use in fuel cells.