New compounds KaHb[ZnW11O39M(H2O)]. xH(2)O (M = Al, Ga or In) were pre
pared and characterized by elemental analysis, IR and UV and Al-27 NMR
spectroscopy, electrochemistry and X-ray crystallography. In the crys
tals of K6H3[ZnW11AlO40]. 9.5H(2)O, the anion is of the alpha-type Keg
gin structure with C-s symmetry. The Al and W atoms are statistically
distributed in the crystal. (C) 1997 Elsevier Science Ltd.