Variation of the reduced cell parameters in the orthorhombic phase (space group Pbnm) with temperature for $\mathrm{CaLn}_{2} \mathrm{CuTi}_{2} \mathrm{O}_{9}(L n=\mathrm{Pr}, N d, S m)$ from laboratory X-ray diffraction patterns. Dashed lines between points are guide to the eyes.
Variation of the reduced cell parameters in the orthorhombic phase (space group Pbnm) with temperature for \mathrm{CaLn}_{2} \mathrm{CuTi}_{2} \mathrm{O}_{9}(L n=\mathrm{Pr}, N d, S m) from laboratory X-ray diffraction patterns. Dashed lines between points are guide to the eyes.