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Figure 7
Temperature dependence of the tilting angles [\delta _{\bf a}] (black), [\delta _{\bf b}] (dark gray) and [\delta _{\bf c}] (light gray) of selected octahedra in La5(Ti0.8Fe0.2)5O17 (filled symbols) and La6(Ti0.67Fe0.33)6O20 (open symbols). Triangles pointing up represent tilting angles of octahedra in one [{\bf bc}] layer, while the triangles pointing down refer to octahedra tiltings in a second layer displaced by [{\bf a}]/2. The lines are linear fits to the data. The data points for 90 K are excluded from the fit, because they deviate from the linear behavior for [\delta _{b}].

Journal logoSTRUCTURAL SCIENCE
CRYSTAL ENGINEERING
MATERIALS
ISSN: 2052-5206
Volume 69| Part 2| February 2013| Pages 137-144
doi:10.1107/S2052519213003126
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