Superspace description of the crystal structures of Can(Nb,Ti)nO3n + 2 (n = 5 and 6)

Guevarra, J.; Schönleber, A.; van Smaalen, S.; Lichtenberg, F.

doi:10.1107/S0108768107002340

Acta Crystallographica Section B
Acta Crystallographica
Section B STRUCTURAL SCIENCE, CRYSTAL ENGINEERING AND MATERIALS

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Figure 1
Projections of the structures along $[{\bf b}]$ of (a) Ca₅Nb₄TiO₁₇ (n = 5) and (b) Ca₆(Nb,Ti)₆O₂₀ (n = 6) in the monoclinic b-unique setting. The circles represent Ca atoms while (Nb,Ti)O₆ octahedra are outlined. The slabs consisting of five and six layers of octahedra, respectively, are stacked along the $[{\bf c}]$ axis. The numbers give the numbering of the Nb/Ti cations in the respective superstructures. The top line in each figure refers to the octahedra at the border of the unit cell (x = 0), the bottom line to those in the middle of the cell (x = 1/2).

STRUCTURAL SCIENCE
CRYSTAL ENGINEERING
MATERIALS

ISSN: 2052-5206

Volume 63| Part 2| March 2007| Pages 183-189

doi:10.1107/S0108768107002340

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