Existence of high-order superlattices in orientationally ordered C[sub 60]

Journal Article · Tue Jun 01 04:00:00 EDT 1993 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.47.14614· OSTI ID:6785468

Fischer, J E; Luzzi, D E; Kniaz, K ^[1]; McGhie, A R; Ricketts-Foot, D A; Romanow, W R ^[2]; Vaughan, G B.M.; Heiney, P A ^[3]; Li, D; Smith, A L ^[4]; Strongin, R M; Cichy, M A; Brard, L; Smith, III, A B ^[5]

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1. Department of Materials Science and Engineering and Laboratory for Research on the Structure of Matter, University of Pennsylvania, Philadelphia, Pennsylvania 19104 (United States)
2. Laboratory for Research on the Structure of Matter, University of Pennsylvania, Philadelphia, Pennsylvania 19104 (United States)
3. Department of Physics and Laboratory for Research on the Structure of Matter, University of Pennsylvania, Philadelphia, Pennsylvania 19104 (United States)
4. Chemistry Department, Drexel University, Philadelphia, Pennsylvania 19104 (United States)
5. Department of Chemistry and Laboratory for Research on the Structure of Matter, University of Pennsylvania, Philadelphia Pennsylvania 19104 (United States)

We correlate the presence or absence of high-order modulated structures in solid C[sub 60] with the differential scanning calorimetry signature of the orientational ordering transition and other diagnostic data. We have searched for, but not observed, the 2[bold a] face-centered cubic structure recently observed in low-temperature electron and single-crystal x-ray diffraction. We conclude that the [ital intrinsic] ground state is the previously reported simple cubic structure [space group [ital Pa][bar 3], [bold a](14 K)=14.06 A], and that other structures may be stabilized by defects or impurities.

• DOE Contract Number: FG02-86ER45254; FG05-90ER75596
• OSTI ID: 6785468
• Journal Information: Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 47:21; ISSN 0163-1829; ISSN PRBMDO
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360602* -- Other Materials-- Structure & Phase Studies
CARBON
COHERENT SCATTERING
CRYSTAL STRUCTURE
DIFFRACTION
ELEMENTS
FULLERENES
NONMETALS
ORDER-DISORDER TRANSFORMATIONS
ORIENTATION
PHASE TRANSFORMATIONS
SCATTERING
SUPERLATTICES
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE
TEMPERATURE RANGE 0000-0013 K
TEMPERATURE RANGE 0013-0065 K
TEMPERATURE RANGE 0065-0273 K
TEMPERATURE RANGE 0273-0400 K
X-RAY DIFFRACTION