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\bibitem{Zaikina_etal2007} {\textquotedblleft}\textit{Sn$_{20.5-3.5}$As$_{22}$I$_{8}$: a largely disordered cationic clathrate with a new type of superstructure and abnormally low thermal conductivity}{\textquotedblright}. Zaikina JV, Kovnir KA, Sobolev AV, Presniakov IA, Prots Y, Baitinger M, Schnelle W, Olenev AV, Lebedev OI, Van Tendeloo G, Grin Y, Shevelkov AV, Chemistry: a European journal \textbf{13}, 5090 (2007).   http://doi.org/10.1002/chem.200601772

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