Synthesis, characterization and structure of (NH4)4[Zn5VVO56H2(H2O)4] with a novel V5O14 layer.A novel zinc vanadate (NH4)4[Zn5VIV4VV16O56H2(H2O)4] was synthesized by the hydrothermal method and a zinc-vanadium-water system without any organic media was studied for the first time. 
THERM