E. Weller, M. Ellerby, S. S. Saxena, R. P. Smith, and N. T. Skipper, Superconductivity in the intercalated graphite compounds C6Yb and C6Ca, Nature Physics, vol.67, issue.1, p.39, 2005.
DOI : 10.1103/PhysRevB.65.212505

G. Hinks, D. Rosenmann, H. Claus, M. S. Bailey, and J. D. Jorgensen, superconductor, Physical Review B, vol.75, issue.1, p.14509, 2007.
DOI : 10.1103/PhysRevB.75.014509

P. B. Csanyi, A. H. Littlewood, C. J. Nevidomskyy, B. D. Pickard, and . Simons, The role of the interlayer state in the electronic structure of superconducting graphite intercalated compounds, Nature Physics, vol.279, issue.1, p.42, 2005.
DOI : 10.1103/PhysRevLett.85.5122

F. Calandra and . Mauri, Possibility of superconductivity in graphite intercalated with alkaline earths investigated with density functional theory, Physical Review B, vol.74, issue.9, p.94507, 2006.
DOI : 10.1103/PhysRevB.74.094507

URL : https://hal.archives-ouvertes.fr/hal-00132053

G. Sanna, A. Profeta, A. Floris, E. K. Marini, S. Gross et al., : A first-principles density functional calculation, Physical Review B, vol.75, issue.2, p.20511, 2007.
DOI : 10.1103/PhysRevB.75.020511

V. Connétable, B. Timoshevskii, J. Masenelli, J. Beille, B. Marcus et al., Semiconductors: The Case of the Clathrates, Physical Review Letters, vol.91, issue.24, p.247001, 2003.
DOI : 10.1103/PhysRevLett.91.247001

P. Blase, A. S. Gillet, P. Miguel, and . Melinon, Exceptional Ideal Strength of Carbon Clathrates, Physical Review Letters, vol.92, issue.21, p.215505, 2004.
DOI : 10.1103/PhysRevLett.92.215505

URL : https://hal.archives-ouvertes.fr/hal-00097739

G. Parry, Structural ordering in intercalation compounds, Materials Science and Engineering, vol.31, p.99, 1977.
DOI : 10.1016/0025-5416(77)90020-9

R. Rousseaux, D. Moret, P. Guerard, and . Lagrange, -intercalated graphite single crystals, Physical Review B, vol.42, issue.1, p.725, 1990.
DOI : 10.1103/PhysRevB.42.725

URL : https://hal.archives-ouvertes.fr/hal-01058968

D. Fuerst, J. E. Fischer, J. D. Axe, J. B. Hastings, and D. B. Mc-whan, : Observation of a Fractional Stage, Physical Review Letters, vol.50, issue.5, p.357, 1983.
DOI : 10.1103/PhysRevLett.50.357

M. Bloch, H. Katz, D. Moses, V. B. Cajipe, and J. E. Fischer, at high pressure, Physical Review B, vol.31, issue.10, p.6785, 1985.
DOI : 10.1103/PhysRevB.31.6785

D. Fuerst, D. Moses, and J. E. Fischer, -axis resistivity of potassium???intercalated graphite, Physical Review B, vol.24, issue.12, p.7471, 1981.
DOI : 10.1103/PhysRevB.24.7471

URL : https://hal.archives-ouvertes.fr/hal-01310099

N. Wada, High-pressure x-ray and Raman studies of rubidium and cesium graphite intercalation compounds, Physical Review B, vol.24, issue.2, p.1065, 1981.
DOI : 10.1103/PhysRevB.24.1065

S. Gauzzi, N. Takashima, C. Takeshita, H. Terakura, N. Takagi et al., under High Pressure, Physical Review Letters, vol.98, issue.6, p.67002, 2007.
DOI : 10.1103/PhysRevLett.98.067002

URL : https://hal.archives-ouvertes.fr/hal-00560165

M. Los, P. Letellier, L. Azais, and . Duclaux, Li doped carbons (activated microporous carbons and graphite): Characterisation by resonance spectroscopies (ESR and 7Li NMR) and their potentiality for hydrogen adsorption, Journal of Physics and Chemistry of Solids, vol.67, issue.5-6, p.1182, 2006.
DOI : 10.1016/j.jpcs.2006.01.092

P. Guérard, M. Lagrange, A. Elmakrini, and . Herold, Etude structurale du graphiture I de cesium, Carbon, vol.16, issue.4, p.285, 1978.
DOI : 10.1016/0008-6223(78)90044-1

P. Hammersley, S. O. Svensson, M. Hanfland, A. N. Fitch, and D. Hausermann, Two-dimensional detector software: From real detector to idealised image or two-theta scan, High Pressure Research, vol.14, issue.4-6, p.235, 1996.
DOI : 10.1107/S0021889886089458

K. Mao, P. M. Bell, J. W. Shaner, and D. J. Steinberg, fluorescence pressure gauge from 0.06 to 1 Mbar, Journal of Applied Physics, vol.49, issue.6, p.3276, 1978.
DOI : 10.1063/1.325277

S. Klotz, T. Strassle, G. Rousse, G. Hamel, and V. Pomjakushin, Angle-dispersive neutron diffraction under high pressure to 10GPa, Applied Physics Letters, vol.86, issue.3, p.31917, 2005.
DOI : 10.1063/1.1855419

URL : https://hal.archives-ouvertes.fr/hal-00020276

. Sherley, The crysfire 2002 system for automatic powder indexing: User's manual, the lattice press, 41 guildford park avenue, guildford, surrey gu2 7nl, 2002.

B. Laugier and . Bochu, Checkcell: Lmgp-suite suite of programs for the interpretation of x-ray experiments, enspg/laboratoire des matériaux et du génie physique, saint martin d'h` eres, france, 2004.

A. Nalimova, D. Guerard, D. E. Sklovsky, and D. Cox, High pressure in-plane structural study of lithium and cesium highly saturated GICS, Journal of Physics and Chemistry of Solids, vol.57, issue.6-8, p.771, 1996.
DOI : 10.1016/0022-3697(95)00347-9

H. Hanfland, K. Beister, and . Syassen, Graphite under pressure: Equation of state and first-order Raman modes, Physical Review B, vol.39, issue.17, p.12598, 1989.
DOI : 10.1103/PhysRevB.39.12598

J. Kim, J. E. Fischer, D. B. Mcwhan, and J. D. Axe, Neutron diffraction study of potassium-graphite intercalation compounds at high pressure: Staging transitions and one-dimensional disorder, Physical Review B, vol.33, issue.2, p.1329, 1986.
DOI : 10.1103/PhysRevB.33.1329

W. Yagi, M. Utsumi, T. Yamakata, O. Kikegawa, and . Shimomura, x-ray-diffraction study of the phase transformation from graphite to hexagonal diamond at room temperature, Physical Review B, vol.46, issue.10, p.6031, 1992.
DOI : 10.1103/PhysRevB.46.6031

J. Nemanich, S. A. Solin, and D. Gúerard, Raman scattering from intercalated donor compounds of graphite, Physical Review B, vol.16, issue.6, p.2965, 1977.
DOI : 10.1103/PhysRevB.16.2965

C. Eklund, G. Dresselhaus, M. S. Dresselhaus, and J. E. Fischer, Raman scattering from in-plane lattice modes in low-stage graphite-alkali-metal compounds, Physical Review B, vol.16, issue.8, p.3330, 1977.
DOI : 10.1103/PhysRevB.16.3330

L. Doll, P. C. Eklund, and J. E. Fischer, Raman scattering study of the high-frequency graphitic intralayer modes in Li-graphite and the stage dependence of the mode frequency in donor graphite intercalation compounds, Physical Review B, vol.36, issue.9, p.4940, 1987.
DOI : 10.1103/PhysRevB.36.4940

S. A. Caswell and . Solin, Light scattering from ordered and disordered stage-1 cesium graphite, Physical Review B, vol.20, issue.6, p.2551, 1979.
DOI : 10.1103/PhysRevB.20.2551

L. Schindler and Y. K. Vohra, A micro-Raman investigation of high-pressure quenched graphite, Journal of Physics: Condensed Matter, vol.7, issue.47, p.637, 1995.
DOI : 10.1088/0953-8984/7/47/001

P. Newville, Y. Livins, E. A. Yacoby, J. J. Stern, and . Rehr, Near-edge x-ray-absorption fine structure of Pb: A comparison of theory and experiment, Physical Review B, vol.47, issue.21, p.14126, 1993.
DOI : 10.1103/PhysRevB.47.14126

L. Ankudinov, B. Ravel, J. J. Rehr, and S. D. Conradson, Real-space multiple-scattering calculation and interpretation of x-ray-absorption near-edge structure, Physical Review B, vol.58, issue.12, p.7565, 1998.
DOI : 10.1103/PhysRevB.58.7565