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Effect of impurity oxygen molecules on the structural and thermodynamic properties of fullerite
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View: Figures


Image of FIG. 1.
FIG. 1.

Lattice parameter of fullerite as a function of the oxygen saturation time at room temperature and pressure .

Image of FIG. 2.
FIG. 2.

Temperature dependences of the lattice parameters of pure fullerite46 (—) and fullerite, saturated under ordinary conditions by oxygen molecules (○); data from investigations of the high-temperature phase of pure fullerite (☆).24

Image of FIG. 3.
FIG. 3.

Values of the parameters of the fullerite lattice with different degrees of filling of the octahedral voids by simple molecular substances: neon41,42 (◆ and ▷); argon39,43 (◻ and ◼), respectively; nitrogen15,18,26 (☆); oxygen—this work (+), Ref. 14 (★); (◇);30 CO (▽);27–29 helium (△).39

Image of FIG. 4.
FIG. 4.

Variation of the intensity of the (220) reflection of fullerite (◼) during its saturation by oxygen molecules at pressure and temperature .

Image of FIG. 5.
FIG. 5.

X-Ray diffraction patterns of fullerite at different oxygen intercalation times. Top diffraction pattern—initial state (pure fullerite), bottom pattern—after soaking of the samples in oxygen atmosphere at and .

Image of FIG. 6.
FIG. 6.

Variation of the lattice parameter of fullerite with intercalation at and .

Image of FIG. 7.
FIG. 7.

Variation of the temperature of the orientational phase transition with increasing lattice parameter of fullerite as a result of intercalation with atoms and molecules of different substances: pure (○);46 neon (▲);41,42 helium Ref. 38 (▽), 30 (◬); argon (★);43 carbon monoxide CO (●);27–29 oxygen (△);14,17 nitrogen (☆);15,26 methane (◻) and deuteromethane (◼);36 krypton (◇);44 xenon (◆);44,45 hydrogen (▼).34,35

Image of FIG. 8.
FIG. 8.

Variation of the intensity of x-ray reflections during oxygen intercalation of fullerite at and .


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Effect of impurity oxygen molecules on the structural and thermodynamic properties of fullerite C60