Isopolymolybdates and Isopolytungstates

The Structure of Na2W2O7·H2O Synthesized under High Pressure and Temperature

“…As found earlier (41), the WO 6 octahedra deviates substantially from the trendline given in (40). Data from ZnWO 4 , CdWO 4 , HgWO 4 and the phases in the Na 2 W 2 O 7 -H 2 O system gives a trendline with an inclination of 3.8 Â 10 À4 instead of 3 Â 10 À4 . However, the individual s.u.…”

“…6, it is seen that all phases in the Na 2 W 2 O 7 -H 2 O system have strongly distorted WO 6 octahedra. The highest distortion is for the hemihydrate, approximately the same as that for WO 6 in HgWO 4 . As found earlier (41), the WO 6 octahedra deviates substantially from the trendline given in (40).…”

Nanocatalysis: Mature Science Revisited or Something Really New?

“…[113] In order to arrive at this result it was essential to investigate the solution-phase chemistry of molybdates. [120][121][122] Precipitation conditions were chosen such that the synthons coexisted with the linker units in solution. The substantial analytical effort that was required to find the region of coexistence of homonuclear building blocks and linkers prevented systematic optimization with respect to larger length scales, the connectivity of the network, and the reactivity of the initial precipitate to give different crystal sizes and shapes.…”

Darstellung und Struktur des Polyvanadato-periodates Na6[H2V2I2O16]·10H2O / Preparation and Crystal Structure of the Heteropoly Periodate Na6[H2V2I2O16]·10H2O

“…127,2 V 10,9. (7) 0,02 (7) 0,01 (7 02 7719 (2) 0360 (3) 6688 (4) 0,63(9) 0,77 (9) 1,07(9) -0,19(7) 0,10(7) -0,00 (7 03 8742 (2) 7696 (3) 9633 (4) 0,50(9) 0,88 (9) 1,03(9) -0,11(7) -0,15(7) -0,02 (7 04 5527 (2) 9797 (3) 7813 (4) 0,43(9) 0,76 (9) 1,06(9) -0,10(7) -0,21 (7) 0,05 (7 05 6824 (2) 0019 (3) 0863 (4) 0,45(9) 0,83(9) 0,92(9) 0,08(7) -0,09(7) -0,25 (7 06 7562 (2) 7574 (3) 6083 (4) 0,66(9) 0,85(9) 0,86(9) -0,42 (7) 0,03(7) -0,40 (7 07 4592 (2) 7242 (3) 7450 (4) Beide gehören zu dem schon von Kepert [8], Glemser und Tytko [9,10] Das Wasserstoffatom wurde in einer Differenzsynthese aufgefunden. Charakteristisch für das Hauptgruppenelement Iod ist der im Vergleich zu Vanadin viel geringere Unterschied in den Abstän-den terminaler und verbrückender Sauerstoffatome, was auf der mangelnden Fähigkeit des Iods zur Ausbildung von (for-Bindungen beruht.…”