Add time:08/10/2019         Source:sciencedirect.com

New reduced tantalate, Na2Ca2Ta3O10, and titanate, Na1·0Ca0·95La2Ti3O10, were synthesized by intercalation reaction from the parent Dion–Jacobson and Ruddlesden–Popper type layered perovskite compounds. The crystal structure of the tantalate was determined by the Rietveld analysis of the powder X-ray diffraction pattern. The intercalation compound, Na2Ca2Ta3O10, is the first example of reduced tantalate with the Ruddlesden–Popper type structure. In some of reduced tantalate and titanate compounds, the diamagnetic signals have been observed below 7 K. Therefore, these compounds are thought to be good candidates for new oxide superconductors.

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