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- W2950811688 abstract "Rare-earth niobates and tantalates are functional materials that are exploited as photocatalysts, host lattices for phosphors, and ion conductors. These phases are extremely challenging to synthesize by methods other than solid-state processing, which limits expansion of this useful class of materials. Hydrothermal processing in particular is hampered by the incompatibility of base-soluble tantalate or niobate with acid-soluble rare-earth oxides. Furthermore, an added challenge with tantalates is they are especially inert and insoluble. We present here a general hydrothermal process that has produced a range of rare-earth niobate/tantalate materials; including new phases, (La,K,◻)2Nb2O7−x(OH)2 (1) and Ln2Ta2O7(OH)2 (2) (◻ = vacancy, Ln = La−Sm—excluding radioactive promethium). The structures of 1 and the La-analogue of 2 were determined from powder X-ray diffraction data collected at the APS 11-BM line and corroborated by compositional analyses, infrared spectroscopy, 139La and 1H MAS NMR, and thermograv..." @default.
- W2950811688 created "2019-06-27" @default.
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- W2950811688 date "2009-09-15" @default.
- W2950811688 modified "2023-09-27" @default.
- W2950811688 title "ChemInform Abstract: Aqueous Synthesis and Structural Comparison of Rare Earth Niobates and Tantalates: (La,K,□)2Nb2O7-x(OH)2and Ln2Ta2O7(OH)2(□: vacancy; Ln: La-Sm)." @default.
- W2950811688 cites W1980285336 @default.
- W2950811688 doi "https://doi.org/10.1002/chin.200937020" @default.
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