X-ray-induced dissociation of H2O and formation of an O2-H2 alloy at high pressure |
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Authors: | Mao Wendy L Mao Ho-Kwang Meng Yue Eng Peter J Hu Michael Y Chow Paul Cai Yong Q Shu Jinfu Hemley Russell J |
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Institution: | Los Alamos Neutron Science Center, Los Alamos National Laboratory, Los Alamos, NM 87545, USA. |
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Abstract: | When subjected to high pressure and extensive x-radiation, water (H2O) molecules cleaved, forming O-O and H-H bonds. The oxygen (O) and hydrogen (H) framework in ice VII was converted into a molecular alloy of O2 and H2. X-ray diffraction, x-ray Raman scattering, and optical Raman spectroscopy demonstrated that this crystalline solid differs from previously known phases. It remained stable with respect to variations in pressure, temperature, and further x-ray and laser exposure, thus opening new possibilities for studying molecular interactions in the hydrogen-oxygen binary system. |
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