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Full Record Details
Persistent URL
http://purl.org/net/epubs/work/49257
Record Status
Checked
Record Id
49257
Title
A high-resolution neutron scattering study of the hydrogen-driven metal-insulator phase transition in KC
8
H
x
Contributors
A Lovell (STFC Rutherford Appleton Lab.)
,
NT Skipper (UCL)
,
SM Bennington (STFC Rutherford Appleton Lab.)
,
RI Smith (STFC Rutherford Appleton Lab.)
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 χ-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.
Organisation
CCLRC
,
ISIS
,
ISIS-POLARIS
Keywords
Physics
,
Materials
,
phase transition
,
hydrogen
,
neutron scattering
,
graphite intercalation
Funding Information
Related Research Object(s):
Licence Information:
Language
English (EN)
Type
Details
URI(s)
Local file(s)
Year
Journal Article
J Alloys Comp
446-447 (2007): 397-401.
doi:10.1016/j.jallcom.2007.01.135
2007
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