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(NH4)12[Cu3(H2O)3Sb2W18O66].9H2O,Mr = 5232.06, orthorhombic, space group Pmcn, a=15.423(4), b = 19.307(6), c = 30.275(6) A,V= 9015.0 A3, Z=4,Dc=3.866 g/cm3,u= 247.569 cm-1,R = 0.064 for 2652 observed reflections [I> 3σ(I)]. X-ray analysis shows that the heteropoly anion of the title compound consists of two α-β-SbW9O33 subunits, which are derived from the a-Keggin structure by loss of one W3O13 group constituted by three edge-sharing WO6 octahedra, merged together through the connection with three CuO4(H2O) units with the O atoms shared with the W atoms.
(NH4) 12 [Cu3 (H2O) 3Sb2W18O66] .9H2O, Mr = 5232.06, orthorhombic space group Pmcn, a = 15.423 (4), b = 19.307 (6), c = 30.275 (6) A, V = 9015.0 A3 , Z = 4, Dc = 3.866 g / cm 3, u = 247.569 cm -1, R = 0.064 for 2652 observed reflections [I> 3σ (I)]. X-ray analysis shows that the heteropoly anion of the title compound consists of two α-β-SbW9O33 subunits, which are derived from the a-Keggin structure by loss of one W3O13 group formed by three edge-sharing WO6 octahedra, merged together through the connection with three CuO4 (H2O) units with the O atoms shared with the W atoms.