Hydrothermal Synthesis and Structure of a Potassium Tantalum Defect Pyrochlore
Citations Over Time
Abstract
The synthesis and crystal structure of potassium tantalate (KTa(2)(O,OH)(6).1.8H(2)O) with a defect pyrochlore structure are reported. The compound was crystallized directly from tantalum pentoxide in basic solution under hydrothermal conditions at temperatures as low as 200 degrees C. Ion exchange of this substance in acid yielded an H-type defect pyrochlore. Both highly crystalline K-type and H-type materials absorb argon and have BET surface areas of about 14 m(2)/g. The crystal structures were refined by the Rietveld least-squares method from powder X-ray diffraction data. The final R(wp) and chi(2) were 7.70% and 2.79, respectively. The high thermal stability and control of acidity of these materials, along with the simple and cheap synthesis, may find many applications in sorption, catalysis, and microelectronics.
Related Papers
- → Extraction of Tantalum Powder via the Magnesium Reduction of Tantalum Pentoxide(2019)26 cited
- → Hydrothermal synthesis of perovskite and pyrochlore powders of potassium tantalate(2002)82 cited
- → A Feasibility Study of Splenohepatography with Tantalum Metal and Tantalum Pentoxide(1972)4 cited
- → Influence of the presence of titanium oxide on the formation of pyrochlore phase in ferroelectric strontium bismuth tantalate ceramics(1999)1 cited
- → Comparison of the Optical Properties of Tantalum Pentoxide (Ta2O5) Anodically Grown from E-beam Deposited Tantalum (Ta) with Ta2O5 E-beam Deposited from a Ta2O5 Source(2011)