We report on the synthesis and structural characterization of four bismuth(III)-containing sandwich-type heteropolytungstates with Bi in 8-coordination. The three isostructural Keggin-type ions [Bi(α-XW 11 O 39 ) 2 ] n-{X = Si (1), Ge (2), n = 13; X = P (3), n = 11} and the Wells-Dawson-type ion [Bi(α 2 -P 2 W 17 O 61 ) 2 ] 17-(4) were prepared via simple one-pot synthetic [a]
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