| 1. |
- Lundin, A., et al.
(författare)
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Compression properties and p-T phase diagrams of C60, C70, and C61D2
- 1996
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Ingår i: Proceedings of the Symposium on Recent Advances in the Chemistry and Physics of Fullerenes and Related Materials. - Pennington, NJ : Electrochemical Society, Incorporated. - 1566771625 ; , s. 1138-1142
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Konferensbidrag (refereegranskat)
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| 2. |
- Lundin, Anders, et al.
(författare)
-
Compression properties and p-T phase diagrams of C60, C70, and C61D2
- 1996
-
Ingår i: Fullerenes: Recent Advances in the Chemistry and Physics of Fullerenes and Related Materials, volume 3. - 1566771625 ; , s. 1138-1142
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Konferensbidrag (refereegranskat)abstract
- We have measured the compression properties of C60, C70, and C61D2 in the range 0 - 1.2 GPa over large ranges in temperature (150 to 420 K). Our results for simple cubic (sc) C60 agree well with several recent studies using different methods, but data for face centered cubic (fcc) C60 and for C70 differ strongly between different groups. From our data we deduce the low-temperature orientational, rotational, and translational structural phase diagram of C60, but similar studies on C70 and C61D2 show that these materials have more complicated phase diagrams which cannot yet be mapped in detail.
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| 3. |
- Sundqvist, Bertil, et al.
(författare)
-
Physical properties of pressure polymerized C60
- 1996
-
Ingår i: Proceedings of the Symposium on Recent Advances in the Chemistry and Physics of Fullerenes and Related Materials. - Pennington, NJ : Electrochemical Society, Incorporated. - 1566771625 ; , s. 1014-1028
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Konferensbidrag (refereegranskat)
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| 4. |
- Sundqvist, Bertil, et al.
(författare)
-
Physical properties of pressure polymerized C60
- 1996
-
Ingår i: Fullerenes: Recent Advances in the Chemistry and Physics of Fullerenes and Related Materials, volume 3. - Pennington, NJ : The Electrochemical Society. - 1566771625 ; , s. 1014-1028
-
Konferensbidrag (refereegranskat)abstract
- We present in this paper an overview of the physical properties of the high pressure polymerized C60 phase commonly known as "soft fcc". This phase has been studied by several methods over wide ranges in temperature T and/or pressure, p. We present here experimental information about the specific heat capacity, the thermal expansion coefficient, the lattice structure, and the thermal conductivity, and we also show results obtained by NMR and Raman spectroscopy. All data presented agree with the accepted model that the individual molecules in this phase are covalently bound to form linear molecular chains. In particular, the NMR data show clearly the presence of covalent bonds, and the Raman data exhibit several new lines at very low energies connected with chain vibrations. Thermal conductivity data obtained during polymerization show both the time dependence of the process and that polymerization occurs at lower p and T than observed previously for this phase.
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