Acta Crystallographica Section E (Dec 2010)

(CaxNd11-x)Ru4O24 (x = 4.175)

  • Nobuo Ishizawa,
  • Keita Okada,
  • Jun Wang,
  • Hironaga Iguchi,
  • Terutoshi Sakakura

DOI
https://doi.org/10.1107/S1600536810046593
Journal volume & issue
Vol. 66, no. 12
pp. i80 – i80

Abstract

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Single crystals of the title compound, calcium neodymium ruthenate, (CaxNd11-x)Ru4O24 (x = 4.175), have been grown by the flux method. The structure consists of two crystallographically independent RuO6 octahedra, which are isolated from each other and embedded in a matrix composed of the Ca and Nd atoms. There are seven M sites which accommodate the Ca and Nd atoms with different populations. Four M sites at general positions are enriched with Nd, whereas the remaining three M sites on twofold rotation axes are enriched with Ca. The coordination numbers of O atoms to the M sites range from 6 to 9. The mean oxidation state of Ru was estimated at +4.79 from the composition analysis. The title compound is non-centrosymmetric and potentially multiferroic.