Heat capacity and raman scattering in C70 crystal

Sekine, Tomoyuki; Kuroe, Haruhiko; Makimura, Chisa; Tanokura, Yoshiko; Takeuchi, Toshio

doi:10.1016/0379-6779(94)02888-6

Cited by 6 publications

(6 citation statements)

References 10 publications

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“…Concerning the second dielectric anomaly that we observed at 150 K, there is only one report on a probable lattice anomaly near this temperature according to Raman spectroscopy data. 14 It should be emphasized that the authors of ref 14 indicated that they did not observe any differences of Raman spectra between samples made by the evaporation from benzene solutions or by sublimation methods.…”

Section: Resultsmentioning

confidence: 94%

“…Even less is known about the behavior of C 70 in other solvents. Large C 70 crystals were obtained by crystallization from benzene solution . No structural analysis was performed on these crystals.…”

Section: Intoductionmentioning

confidence: 99%

“…Large C 70 crystals were obtained by crystallization from benzene solution. 14 No structural analysis was performed on these crystals. It is rather questionable if these crystals are pure or solvated C 70 compounds.…”

Section: Intoductionmentioning

confidence: 99%

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Dielectric Properties of C₇₀-Solvate Crystals Grown from a Benzene Solution

et al. 1998

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C 70 crystals with size up to 3 × 3 × 0.2 mm were grown from benzene solution. The real and imaginary parts of the complex conductivity of this crystals were studied in the frequency range 20 Hz-1 MHz and the temperature range from 10 K to the room temperature. The temperature dependence of the real and imaginary parts of conductivity showed two frequency-independent anomalies at 150 and 275 K. These anomalies are interpreted as phase transitions.

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Section: Resultsmentioning

confidence: 94%

Section: Intoductionmentioning

confidence: 99%

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Dielectric Properties of C₇₀-Solvate Crystals Grown from a Benzene Solution

et al. 1998

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“…The growth methods are described in detail in our previous publications. 12 Briefly, the growth device consists of two chambers separated by a filter. The lower chamber is heated from the bottom, the solvent evaporated from the lower chamber is condensed on the walls of the upper chamber, which has a lower temperature.…”

Section: Methodsmentioning

confidence: 99%

“…The crystals were grown from a benzene solution by slow evaporation (1−2 mL per day). The growth methods are described in detail in our previous publications …”

Section: Methodsmentioning

confidence: 99%

C₇₀ in Benzene, Hexane, and Toluene Solutions

Talyzin

Engström

1998

J. Phys. Chem. B

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The structural transformations of the C 70 in benzene, toluene, and hexane solutions were studied. The X-ray powder diffraction experiments made directly on the C 70 solution samples showed structural transformations of similar types for all the tested solvents. It is shown that C 70 in benzene and hexane solution forms solvated phases at room temperature similar to the toluene solvate described before (Agafonov, V.; Ceolin, R.; Andre, D.; De Bruijn, J.; Gonthier-Vassal, A.; Szwarc, H.; Rodier, N.; Dugue, J.; Toscani, S.; Sizaret, P. Y.; Fabre, C.; Greugny, V.; Rassat, A. Chem. Phys. Lett. 1993, 208, 68). Experiments with C 70 crystallized from benzene solutions performed at room temperature resulted in the formation of the orthorhombic solvated phase, while crystals grown at T > 40°C appeared to be a mixture of the pure C 70 hcp phase and the monoclinic solvate phase.

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