Synthesis and Structural Characterization of Reduced Ternary Tantalum Oxides in the Tetragonal Tungsten Bronze Structure

Luminescent and structural properties of the series Ba6−xEuxTi2+xTa8−xO30 and Ba4−yKyEu2Ti4−yTa6+yO30

“…may be very interesting. Here in this report, we present structural and luminescent properties of the Eu doped, Eu and K co-doped Ba 6 Ti 2 Ta 8 O 30 . These materials crystallize in TTB structure and exhibit efficient excitation at about 400 nm and typical emission of Eu 3+ at about 580-620 nm.…”

An X-Ray Powder and Electron Diffraction Study of Reduced Tantalates with the Perovskite Structure, Na1−xSrxTaO3, 0<x≤0.4

“…Recently, there have been also reports of reduced compounds with a layered perovskitetype structure, as in Li LaTa O (8), as well as more reduced oxotantalates containing metal clusters: Mn Ta O (9) and MAl Ta O (M"Na, K, Rb) (10), and also Ba Ta O . (7). We have been investigating oxoniobates with various degrees of reduction for several years.…”

A Potassium Tantalum(V) Tetrasilicate KTaSi2O7

“…(11). However, only a few reduced tantalum oxides are known, In this paper, the refined single crystal structure of for example, Ba 3 Ta 5 O 15 (5) form when heating was at ȁ1150ЊC/3 days.…”

“…behavior with a resistivity several orders of magnitude higher than the isostructural Nb analog Ba 3 Nb 5 O 15 (5). The chemistry and physics of reduced molybdenum, Recently, Crosnier et al have prepared K 2 (NbO) 2 Si 4 O 12 tungsten, and niobium oxides has been rich due to (i) the with a three-dimensional skeleton structure as a candidate relative ease of preparation, (ii) low-dimensional structural for fast alkali-ion conduction, such as Nasicon (10).…”

“…3). There has been an interest in new reduced tantalum This structure is very similar to that of K 4 (ScOH) 2 Si 4 O 12 oxides analogous to the Nb, Mo, and W phases (4,5). (11).…”