Table 2 Lattice constant a, ionic radius of A-site rA, ionic radius of A′-site rA′, difference between ionic radii of A- and A′-site ions ΔrA, metal−oxygen bond angles ∠A′−O−Ti and ∠Ti−O−Ti for some AA′3Ti4O12 type perovskite compounds33.
From: A combinatory ferroelectric compound bridging simple ABO3 and A-site-ordered quadruple perovskite
Compounds | a/Å | rA/Å | rA/Å | ΔrA/Å | ∠A′−O−Ti/deg | ∠Ti−O−Ti/deg |
|---|---|---|---|---|---|---|
PbHg3Ti4O12 | 7.7234 | 1.49 | 0.96 | 0.53 | 102.60 | 154.22 |
CaPd3Ti4O12 | 7.4977 | 1.34 | 0.64 | 0.70 | 107.17 | 144.93 |
CaFe3Ti4O12 | 7.4672 | 1.34 | 0.64 | 0.70 | 107.82 | 144.01 |
CaCu3Ti4O12 | 7.3730 | 1.34 | 0.57 | 0.77 | 108.98 | 141.33 |
SrCu3Ti4O12 | 7.4275 | 1.44 | 0.57 | 0.87 | 109.18 | 141.21 |
