Scientists have squeezed water between two diamonds to create an entirely new form of ice that’s solid at room temperature.
The ice, named ice XXI, forms when water is subjected to extreme pressure to become metastable — a precarious state that is made physically unstable by the slightest disturbance.
The researchers created ice XXI by supercompressing water between two diamonds and detected it with the European X-Ray Free-Electron Laser (XFEL), the world’s largest X-ray laser. The team found that the supercompressed water structurally changes from a high-density state to a very-high-density state.
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