A contribution to the perrhenate crystal chemistry: the crystal structures of new CdTh[MoO4]3-type compounds

Abstract Singe crystals of four new A I M II [ReO 4 ] 3 perrhenates ( A I = Na, M II = Pb; A I = Na, M II = Sr, Ag, K) have been prepared from the respective A I [ReO 4 ] and M II [ReO 4 ] 2 perrhenates using melt and solution evaporation techniques. All new compounds belong to the hexagonal CdTh[MoO 4 ] 3 structure type, similar to previously known NaCa[ReO 4 ] 3 . We discuss the crystal chemical relationships within this structure type and suggest existence of some more representatives involving other tetrahedral anions.