화학공학소재연구정보센터
Inorganic Chemistry, Vol.54, No.12, 5981-5990, 2015
Effects of Te(IV) Oxo-Anion Incorporation into Thorium Molybdates and Tungstates
The exploration of phase formation in the Th-Mo/W-Te systems has resulted in four mixed oxo-anion compounds from high-temperature solid-state reactions: ThWTe2O9, Th(WO4)(TeO3), ThMoTe2O9, and Th-2(MoO4)(TeO3)(3). All four compounds contain edge-sharing thorium polyhedra linked by MoO4/WO6 and different tellurium oxogroups to form three-dimensional frameworks. In ThVVTe2O9, each helical Th based chain is connected by four tungstotellurite clusters resulting in a building fragment which has a crosssection of four-leafed clovers. The structure of Th(WO4)(TeO3) exhibits a multilayer-sandwich framework composed of thorium tellurite layers with tungsten chains in between. In the case of the molybdate family, ThMoTe2O9 and Th-2(MoO4)(TeO3)(3) are built from puckered Th-Te sheets which are further interconnected by MoO4 tetrahedral linkers. The DSC-TG technique was performed to gain insight into the thermal behavior of the synthesized compounds. Raman spectra of as-prepared phases were obtained and analyzed for signature peaks.