Struktur und Schwingungsspektrum des α-Undekawolframatophosphats Na2[N(CH3)4]4HPW11O39 · 7H2O / Structure and Vibrational Spectrum of the α-Undecatungstophosphate Na2[N(CH3)4]4HPW11O39 · 7H2O

Abstract

The crystal structure of the compound Na2[N(CH3)4]4HPW11O39 · 7H2O was solved by X-ray diffraction. It crystallizes in the space group C2/m with lattice parameters a= 23.895 Å, b = 11.417 Å, c = 28.930 Å, β= 126.0°. The distances between the tungsten atoms and the kind of bridging by oxygen atoms prove the α-isomer. The differences between the vibration spectra of α-undecatungsto-phosphate and α-dodecatungstophosphate are discussed