Abstract
We have measured the (effective) specific heat of single crystals of O60 using ac calorimetry. For an fcc crystal prepared by sublimation, there is a sharp hysteretic lambda-shaped anomaly at 260 K, reflecting a latent heat spread over 3 K, similar to what is observed in powders using differential scanning calorimetry. There is also a discontinuity of 11.6R in the specific heat. For orthorhombic crystals prepared by slow evaporation from a toluene-hexane solution, a nonhysteretic, apparently second-order, transition is observed at 239 K. There is a peak in the specific heat consistent with a transition entropy of R ln12.
Original language | English |
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Pages (from-to) | 13831-13833 |
Number of pages | 3 |
Journal | Physical Review B |
Volume | 45 |
Issue number | 23 |
DOIs | |
State | Published - 1992 |
ASJC Scopus subject areas
- Condensed Matter Physics