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Single-Crystal X-Ray Scattering Study of Superstructures and Phase Transitions in Graphite-Hno3 and Graphite-Br2 Intercalation Compounds

Published online by Cambridge University Press:  15 February 2011

R. Moret
Affiliation:
Laboratoire de Physique des Solides (L.A. 2), Université Paris-Sud, Bã t. 510, 91405 Orsay, FRANCE
R. Comes
Affiliation:
Laboratoire de Physique des Solides (L.A. 2), Université Paris-Sud, Bã t. 510, 91405 Orsay, FRANCE
G. Furdin
Affiliation:
Laboratoire de Chimie du Solide Minéral (L.A. 158), Université de Nancy, 54506 Vandoeuvre les Nancy, FRANCE
H. Fuzellier
Affiliation:
Laboratoire de Chimie du Solide Minéral (L.A. 158), Université de Nancy, 54506 Vandoeuvre les Nancy, FRANCE
F. Rousseaux
Affiliation:
Laboratoire de Chimie du Solide Minéral (L.A. 158), Université de Nancy, 54506 Vandoeuvre les Nancy, FRANCE
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Abstract

In α-C5n-HNO3 the condensation of the room-temperature liquid-like diffuse ring associated with the disorder-order transition around 250 K is studied and the low-temperature. superstructure is examined.

It is found that β-C8n-HNO3 exhibits an in-plane incommensurate order at room temperature.

Two types of graphite-Br2 are found. Low-temperature phase transitions in C8Br are observed at T1 ≍ 277 K and T2 ≍ 297 K. The room-temperature structure of C14Br is reexamined. Special attention is given to diffuse scattering and incommensurability.

Type
Research Article
Copyright
Copyright © Materials Research Society 1983

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References

1. Kindly provided by Schudnel, Mr. (Museum d'Histoire Naturelle, Paris).Google Scholar
2. Fuzellier, H., Thèse Nancy (1974), CNRS AO 9580.Google Scholar
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4. Furdin, G., unpublished results.Google Scholar
5. For details see : Comès, R. Lambert, M. Launois, H. Zeller, H.R., Phys. Rev. B8 571 (1973).CrossRefGoogle Scholar
6. For recent reviews see : Hérold, A. in Intercalated Layered Materials, Lévy, F.A. ed., (D. Reidel, Dordrecht, 1979), pp. 321421 Google Scholar
6a. Dresselhaus, M.S. Dresselhaus, G., Adv. Physics 30 139 (1981).CrossRefGoogle Scholar
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Single-Crystal X-Ray Scattering Study of Superstructures and Phase Transitions in Graphite-Hno3 and Graphite-Br2 Intercalation Compounds
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Single-Crystal X-Ray Scattering Study of Superstructures and Phase Transitions in Graphite-Hno3 and Graphite-Br2 Intercalation Compounds
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Single-Crystal X-Ray Scattering Study of Superstructures and Phase Transitions in Graphite-Hno3 and Graphite-Br2 Intercalation Compounds
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