Author(s): FISCHER JE; LUZZI DE; KNIAZ K; MCGHIE AR; RICKETTSFOOT DA;
ROMANOW WR; VAUGHAN GBM; HEINEY PA; LI D; SMITH AL; STRONGIN
RM; CICHY MA; BRARD L; SMITH AB
Title: EXISTENCE OF HIGH-ORDER SUPERLATTICES IN ORIENTATIONALLY
Source: PHYSICAL REVIEW B-CONDENSED MATTER V0047 N21 JUN 1 1993 pp.
Abstract: We correlate the presence or absence of high-order modulated
structures in solid C60 with the differential scanning
calorimetry signature of the orientational ordering
transition and other diagnostic data. We have searched for,
but not observed, the 2a face-centered cubic structure
recently observed in low-temperature electron and single-
crystal x-ray diffraction. We conclude that the intrinsic
ground state is the previously reported simple cubic structure
(space group Pa3BAR, a(14 K) = 14.06 angstrom), and that
other structures may be stabilized by defects or impurities.