Kristallisation und Strukturuntersuchung von Alkali-Parawolframaten / Crystallization and Structure Determination of Alkaline Metal-Paratungstates

Abstract

The syntheses and crystal structures of the following paratungstates-Z with different alkaline cations are reported and discussed: Na 10 [H 2 W 12 O 42 ] · 20H 2 O (I), Na 10 [H 2 W 12 O 42 ] · 27H 2 O (II), Na 10 [H 2 W 12 O 47 ] · 28H 2 O (III), K 10 [H 2 W 12 O 42 ] · 10H 2 O (IV), K 6 Na 4 [H 2 W 12 O 42 ] · 13H 2 O (V), Cs 6 Na 4 [H 2 W 12 O 42 ] · 16H 2 O (VI), Cs 8 Na 2 [H 2 W 12 O 42 ] · 10H 2 O (VII), Cs 8 Na 2 [H 2 W 12 O 42 ] · 12H 2 O (VIII), K 3 Na 7 [H 2 W 12 O 42 ] · 24H 2 O (IX) and K 5 Na 2 [H 2 W 12 O 42 ] · 12H 2 O (X). Priority has been set on the description of the coordination of the cations with the oxygen ligands H 2 W 12 O 42 10- and H 2 O.