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Persistent URL http://purl.org/net/epubs/work/49257
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Record Id 49257
Title A high-resolution neutron scattering study of the hydrogen-driven metal-insulator phase transition in KC8Hx
Abstract Neutron diffraction studies on hydrogen chemisorbed into the stage-1 graphite intercalation compound KC<sub>8</sub> are presented, including time-resolved scans across the hydriding transition to the saturated compound KC<sub>8</sub>H<sub>0.67</sub>. This transition involved a hydrogen-driven structural change taking place over 11.5 h. The Rietveld-refined structure of KC<sub>8 </sub>was confirmed to be Fdd2 using GSAS. Proposed structures for the stage-2 saturated compound were fitted, the most successful being a tri-layer C12/m1 structure with a reduced &#967;-squared value of 1.940. A partial resolution of the in-plane structure is thus achieved, but further refinement is required to elucidate the hydrogen siting and the diffusion process.
Keywords Physics , Materials , phase transition , hydrogen , neutron scattering , graphite intercalation
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Language English (EN)
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Journal Article J Alloys Comp 446-447 (2007): 397-401. doi:10.1016/j.jallcom.2007.01.135 2007