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\bibitem{Radaelli_etal1995} {\textquotedblleft}\textit{Crystal-structure of the double-hg-layer copper-oxide superconductor (Hg,Pr)$_{2}$Ba$_{2}$(Y,Ca)Cu$_{2}$O$_{8-\delta}$as a function of doping}{\textquotedblright}. Radaelli PG, Marezio M, Tholence JL, Debrion S, Santoro A, Huang Q, Capponi JJ, Chaillout C, Krekels T, Van Tendeloo G, The journal of physics and chemistry of solids \textbf{56}, 1471 (1995).   http://doi.org/10.1016/0022-3697(95)00084-4

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