Methane-intercalated C{sub 60}: Preparation, orientational ordering, and structure
- Sandia National Laboratories, Albuquerque, New Mexico 87185 (United States)
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
The orientational ordering temperature for methane-intercalated C{sub 60} is greatly depressed from {approximately}260K in pure C{sub 60} to {approximately}241 and {approximately}235K in the stable compounds C{sub 60}-CH{sub 4} and C{sub 60}-CD{sub 4}, respectively. {sup 13}C NMR shows that the C{sub 60} molecules have ordered near 200 K while {sup 2}H NMR shows that the CD{sub 4} continues to be completely unoriented and freely rotating. The Rietveld refinement of the structures of C{sub 60}-CD{sub 4} at 15, 200, and 296 K using time-of-flight neutron powder data as well as least-squares refinement of Mo-K{sub {alpha}} x-ray data on C{sub 60}-CH{sub 4} single crystals are consistent with such rotational disorder. {copyright} {ital 1997} {ital The American Physical Society}
- OSTI ID:
- 550498
- Journal Information:
- Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 21 Vol. 56; ISSN 0163-1829; ISSN PRBMDO
- Country of Publication:
- United States
- Language:
- English
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