M. Subramanian, G. Aravamudan, and G. Raoe, Oxide pyrochlores ? A review, Progress in Solid State Chemistry, vol.15, issue.2, pp.55-14310, 1983.
DOI : 10.1016/0079-6786(83)90001-8

M. Seul and D. Andelman, Domain Shapes and Patterns: The Phenomenology of Modulated Phases, Science, vol.16, issue.17, pp.476-751476, 1993.
DOI : 10.1103/PhysRevLett.72.2737

M. Subramanian, Colossal Magnetoresistance Without Mn3+/Mn4+ Double Exchange in the Stoichiometric Pyrochlore Tl2Mn2O7, Science, vol.273, issue.5271, pp.81-8481, 1996.
DOI : 10.1126/science.273.5271.81

R. Ewing, W. Weber, and L. Lian, Nuclear waste disposal?pyrochlore (A2B2O7): Nuclear waste form for the immobilization of plutonium and ?minor? actinides, Journal of Applied Physics, vol.713, issue.8, pp.5949-597110, 2004.
DOI : 10.1063/1.1482784

B. Kennedy and T. Vogt, Structural and Bonding Trends in Ruthenium Pyrochlores, Journal of Solid State Chemistry, vol.126, issue.2, pp.261-2700337, 1996.
DOI : 10.1006/jssc.1996.0337

C. Mins, A. Jacobson, R. Hall, and J. Lewandowski, Methane Oxidative Coupling over Nonstoichiometric Bismuth-Tin Pyrochlore Catalysts, Journal of Catalysis, vol.153, issue.2, pp.197-20710, 1995.
DOI : 10.1006/jcat.1995.1122

K. Sickafus, Radiation Tolerance of Complex Oxides, Science, vol.289, issue.5480, pp.748-751748, 2000.
DOI : 10.1126/science.289.5480.748

S. Arai, Valence Change of Cations in Ceria-Zirconia Solid Solution Associated with Redox Reactions Studied with Electron Energy-Loss Spectroscopy, MATERIALS TRANSACTIONS, vol.45, issue.10, pp.2951-2955, 2004.
DOI : 10.2320/matertrans.45.2951

L. Galoisy, E. Pellerin, M. Arrio, P. Ildefonse, and J. Callas, Evidence for 6-Coordinated Zirconium in Inactive Nuclear Waste Glasses, Journal of the American Ceramic Society, vol.14, issue.9, pp.2219-22241551, 1999.
DOI : 10.1111/j.1151-2916.1999.tb02065.x

B. Uberuaga, Complex oxides: Intricate disorder, Nature Materials, vol.15, issue.5, pp.496-49710, 2016.
DOI : 10.1038/nature04421

J. Shamblin, Probing disorder in isometric pyrochlore and related complex oxides, Nature Materials, vol.15, issue.5, pp.507-511, 2016.
DOI : 10.1088/0953-8984/19/33/335219

D. Huo, Influence of sintering methods on microstructure and ionic conductivity of La 1.95 Sr 0.05 Zr 2 O 6.975 synthesized by co-precipitation, Solid State Ionics, vol.278, pp.181-187, 2015.
DOI : 10.1016/j.ssi.2015.05.028

URL : https://hal.archives-ouvertes.fr/hal-01187785

D. Prusty, A. Pathak, A. Chinta, B. Mukherjee, and A. Chowdhury, Structural Investigations on the Compositional Anomalies in Lanthanum Zirconate System Synthesized by Coprecipitation Method, Journal of the American Ceramic Society, vol.229, issue.0, pp.718-72410, 2014.
DOI : 10.1111/jace.12741

J. Champion, Order in the Heisenberg pyrochlore: The magnetic structure of Gd 2 Ti 2 O 7, doi:10.1103/PhysRevB, p.140407140407, 2001.

D. Michel, M. Perez-y-jorba, and R. Collongues, Study by Raman spectroscopy of order-disorder phenomena occurring in some binary oxides with fluorite-related structures, Journal of Raman Spectroscopy, vol.9, issue.2, pp.163-1802, 1976.
DOI : 10.1016/0025-5408(74)90092-0

J. Cai, C. Raptis, Y. Raptis, and E. Anastassakis, Temperature dependence of Raman scattering in stabilized cubic zirconia, Physical Review B, vol.34, issue.1, pp.201-209, 1995.
DOI : 10.1103/PhysRevB.34.1233

H. Klug and L. Alexander, X ray diffraction procedures, 1954.

N. Brese and M. O-'keeffe, Bond-valence parameters for solids, Acta Crystallographica Section B Structural Science, vol.47, issue.2, pp.192-19710, 1991.
DOI : 10.1107/S0108768190011041

J. Bradley and A. Cracknell, The mathematical theory of symmetry in solids, Clarendon, 1972.

D. Simeone, C. Dodane, D. Gosset, and G. Baldinozzi, Order?disorder phase transition induced by swift ions in MgAl2O4 and ZnAl2O4 spinels, Journal of Nuclear Materials, vol.300, issue.2-3, pp.151-16110, 2002.
DOI : 10.1016/S0022-3115(01)00749-8

P. Blanchard, R. Clements, B. Kennedy, C. Ling, and E. Reynolds, Does Local Disorder Occur in the Pyrochlore Zirconates?, Inorganic Chemistry, vol.51, issue.24, pp.13237-1324410, 2012.
DOI : 10.1021/ic301677b

L. Dash, N. Vast, P. Baranek, M. Cheynet, and L. Reining, zirconia, Physical Review B, vol.89, issue.24, pp.245116-245134, 2004.
DOI : 10.1016/S1093-3263(99)00028-5

URL : https://hal.archives-ouvertes.fr/hal-00077926

V. Petricek, M. Dusek, and L. Palatinus, Jana-Crystallographic computing system, Z. Kristallogr, vol.5, pp.345-352, 2004.

J. Berar and G. Baldinozzi, From x-ray laboratory data to incommensurable modulated phases: Rietveld modelling of complex materials, IUC Newsletter, p.47, 1998.

P. Toledano and J. C. Toledano, Nonferroic phase transitions, Physical Review B, vol.21, issue.3, p.1946, 1946.
DOI : 10.1103/PhysRev.82.729