Lanthanide-Containing 22-Tungsto-2-germanates [Ln(GeW₁₁O₃₉)₂]^13–: Synthesis, Structure, and Magnetic Properties

We report on the synthesis and structural characterization of two series of lanthanide-containing 22-tungsto-2-germanates. The first series corresponds to a family of polyanions with the formula [Ln(β2-GeW11O39)2]13– (LnIII = La (1), Ce (2), Pr (3), Nd (4), Sm (5), Gd (6), Dy (7)), and the second series corresponds to a family with the formula [Ln(β2-GeW11O39)(α-GeW11O39)]13– (LnIII = Ho (8), Er (9), Tm (10)). All compounds were characterized in...