X-ray powder diffraction patterns of the AgNbO3 have been obtained in a wide temperature range: from room temperature up to 850 K. The type of distortion and the multiplicity of the pseudo-cubic perovskite cell has been determined from the splitting of the main diffraction lines and from analysis of the superlattice peaks. The scheme of oxygen octahedra tilting and the sequence of the distorted pseudocubic cell is:
No takes yet. Share an insight, caveat, or question.
Ratuszna et al. (2003) studied this question.