Controlling dimensionality in templated layer, chain and framework structures by combining metal fluorides with oxotetrahedra.

The use of metal fluorides in hydrothermal reactions with linking phosphate and arsenate groups leads to the synthesis of numerous, frequently non-centrosymmetric, structures of controlled dimensionality.

Hydrothermal routes to new sodium hydrogen polytungstates.

The new acidic sodium polytungstates, Na(5)[H(7)W(12)O(42)].20H(2)O () and Na(2)[H(10)W(12)O(42)].20H(2)O (), have been synthesised under hydrothermal conditions where variations of pH and temperature allow control of the protonation of the [W(12)O(42)](12-) cluster in the products.

Synthesis and crystal structures of iron hydrogen phosphates.

Three new iron hydrogen phosphate compositions have been synthesised under hydrothermal conditions; Fe(II)2O(HPO4) ( 1), (NH4)3Fe(III)3(HPO4)6 ( 2) and Fe1.34(III)(PO4)OH0.96 ( 3).