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Synthesis and characterization of the novel Nb3O5F5 niobium oxyfluoride: the term n=3 of the NbnO2n−1Fn+2 series by Stéphane Cordier; Thierry Roisnel; Marcel Poulain is a Materials Science article available to read on EtoBox.

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The solid-state synthesis of the oxyfluoride Nb 3 O 5 F 5 , its crystal structure determined from X-ray powder diffraction data as well as some physical characterizations, are reported. Nb 3 O 5 F 5 constitutes the term n 1⁄4 3 of the Nb n O 2nÀ1 F nþ2 series related to the Dion-Jacobson phases. It crystallizes, at room temperature, in the tetragonal system (space group I4/mmm (no. 139); Z 1⁄4 4; a 1⁄4 3:9135ð1Þ A ̊, c 1⁄4 24:2111ð2Þ A ̊, and V 1⁄4 370:80ð3Þ A ̊3). The crystal structure appears to be an in-between of the threedimensional network of NbO 2 F and the two-dimensional packing of NbOF 3 (term n 1⁄4 1 of the Nb n O 2nÀ1 F nþ2 series). This layered structure consists of slabs made of three Nb(O,F) 6 corner-linked octahedra in thickness (n 1⁄4 3) shifted one from another by a ( 1 2 a þ 1 2 b)/translation. Oxygen and fluorine atoms are randomly distributed over all the ligand sites.

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Author

Stéphane Cordier; Thierry Roisnel; Marcel Poulain

Publisher

Elsevier Science; Elsevier ; Elsevier Inc.; Elsevier BV (ISSN 0022-4596)

Published

2004

Language

EN

Field

Materials Science (Physical Sciences)