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Singe crystals of four new A I M II[ReO4]3 perrhenates (A I = Na, M II = Pb; A I = Na, M II = Sr, Ag, K) have been prepared from the respective A I[ReO4] and M II[ReO4]2 perrhenates using melt and solution evaporation techniques. All new compounds belong to the hexagonal CdTh[MoO4]3 structure type, similar to previously known NaCa[ReO4]3. We discuss the crystal chemical relationships within this structure type and suggest existence of some more representatives involving other tetrahedral anions.

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