A superspace group of the modulated structure in homologous compounds In(InxM1-x)O3(ZnO)m

The modulated structures of In(In_xM_1-x)O₃(Zn0)_m have been studied by HRTEM. Superspace groups of the modulated structure for In(In_0.5Al_0.5)O₃(ZnO)₁₃ and In(In_0.5Fe_0.5)O₃(ZnO)₁₃ are assigned as B1Bmhttps://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9781003063056/c87f8d57-bd6e-40f8-a651-90760b6f3961/content/ieq0215.tif"/> and PP1¯1https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9781003063056/c87f8d57-bd6e-40f8-a651-90760b6f3961/content/ieq0216.tif"/>, respectively. It is shown that the periodicities of the modulation waves are about 7.4 nm and 5.9 nm for In(In_0.5Fe_0.5)O₃(ZnO)₁₃ and In(In_0.5Fe_0.5)O₃(ZnO)₁₃, respectively, where these values are located between those for In(In_0.5Fe_0.5)O₃(ZnO)_m and InMO₃(ZnO)_m. The electron diffraction patterns are well interpreted based on a superspace group description.