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\bibitem{Abakumov_etal2007} {\textquotedblleft}\textit{[SrF$_{0.8}$(OH)$_{0.2}$]$_{2.526}$[Mn$_{6}$O$_{12}$]: columnar rock-salt fragments inside the todorokite-type tunnel structure}{\textquotedblright}. Abakumov AM, Hadermann J, Van Tendeloo G, Kovba ML, Skolis YY, Mudretsova SN, Antipov EV, Volkova OS, Vasiliev AN, Tristan N, Klingeler R, B{\"u}chner B, Chemistry of materials \textbf{19}, 1181 (2007).   http://doi.org/10.1021/cm062508s

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