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ChemInform Abstract: Sodium Hydride as a Powerful Reducing Agent for Topotactic Oxide Deintercalation: Synthesis and Characterization of the Nickel(I) Oxide LaNiO2. by M. A. Hayward; M. A. Green; M. J. Rosseinsky; J. Sloan is a Chemistry article available to read on EtoBox.

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Sodium Hydride as a Powerful Reducing Agent for Topotactic Oxide Deintercalation: Synthesis and Characterization of the Nickel(I) Oxide LaNiO 2 . -Solid NaH serves as a novel reducing agent in the topotactic reduction of the Ni III perovskite oxide LaNiO 3 to the metastable Ni I phase LaNiO 2 (190-210 • C, evacuated Pyrex tube). A new tetragonal infinite-layer compound, NdNiO 2+x , is prepared by reduction of NdNiO 3 with NaH in the temp. range 160-210 • C. The LaNiO 2 phase crystallizes in the tetragonal space group P4/mmm. The simple infinite-layer model has to be significantly modified by a novel defect structure in which additional oxide ions are present in the space between the NiO 2 3-layers and produce both four-coordinate square-planar and five-coordinate square-pyramidal environments for Ni. -(

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Author

M. A. Hayward; M. A. Green; M. J. Rosseinsky; J. Sloan

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); Wiley (ISSN 0931-7597)

Published

1999

Language

EN

Field

Chemistry (Physical Sciences)