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
                   ORDERED C-60

Source:         PHYSICAL REVIEW B-CONDENSED MATTER V0047 N21 JUN 1 1993 pp.
                   14614-14617.

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.