A synchrotron study of Ba 5 Ta 2 Cl 2 O 9 | Zendy

Barnes Andrew D. J. | Zendy; Prior Timothy J. | Zendy; Francesconi M. Grazia | Zendy

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A synchrotron study of Ba 5 Ta 2 Cl 2 O 9

Author(s) -

Barnes Andrew D. J.,

Prior Timothy J.,

Francesconi M. Grazia

Publication year - 2007

Publication title -

acta crystallographica section e

Language(s) - English

Resource type - Journals

ISSN - 1600-5368

DOI - 10.1107/s1600536807016790

Subject(s) - stacking , barium , crystallography , atom (system on chip) , chemistry , oxide , perovskite (structure) , synchrotron , inorganic chemistry , physics , nuclear physics , organic chemistry , computer science , embedded system

The structure of pentabarium ditantalum dichloride nonaoxide, Ba 5 Ta 2 Cl 2 O 9 , is isotypic with Ba 5 Ru 1.6 W 0.4 Cl 2 O 9 and with one polymorph of Ba 5 Ru 2 Cl 2 O 9 . It is related to the perovskite structure and shows a ten‐layer stacking of BaO 3 and BaCl blocks along the c axis. The Ta cations occupy octahedral interstices, forming Ta 2 O 9 dimers of distorted face‐shared TaO 6 octahedra. Except for one O atom, all atoms are situated on special positions: Ba1 (Wyckoff position m 2), Ba2 and Ba3 (3 m .), Ta (3 m .), Cl (3 m .) and O1 ( mm 2).

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