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Single-phase mixed aluminates-titanates Nd 1- x  Sr  x  Al 1- x  Ti  x  O 3  ( x  = 0.3 ÷ 0.9) were prepared from stoichiometric amounts of constituent oxides Nd 2 O 3 , Al 2 O 3 , TiO 2  and strontium carbonate SrCO 3  by solid-state reaction technique in air at 1773 K. Crystal structure parameters of Nd 1- x  Sr  x  Al 1- x  Ti  x  O 3  were refined by full-profile Rietveld refinement in space groups  R\documentclass[12pt]{minimal} 				\usepackage{amsmath} 				\usepackage{wasysym}  				\usepackage{amsfonts}  				\usepackage{amssymb}  				\usepackage{amsbsy} 				\usepackage{mathrsfs} 				\usepackage{upgreek} 				\setlength{\oddsidemargin}{-69pt} 				\begin{document}$$ \overline{3} $$\end{document}    3  ¯c  ( x  = 0.3, 0.5, 0.7 and 0.8) and  Pm\documentclass[12pt]{minimal} 				\usepackage{amsmath} 				\usepackage{wasysym}  				\usepackage{amsfonts}  				\usepackage{amssymb}  				\usepackage{amsbsy} 				\usepackage{mathrsfs} 				\usepackage{upgreek} 				\setlength{\oddsidemargin}{-69pt} 				\begin{document}$$ \overline{3} $$\end{document}    3  ¯m  ( x  = 0.9). Comparison of the obtained structural parameters with the literature data for the end members of the system NdAlO 3  and SrTiO 3  revealed formation of two kinds of solid solutions Nd 1-x Sr x Al 1-x Ti x O 3  with the cubic and rhombohedral perovskite structure. Morphotropic rhombohedral-to-cubic phase transition in Nd 1-x Sr x Al 1-x Ti x O 3  series occurs at  x  = 0.84. Based on the results obtained as well as the literature data for the parent compounds, the tentative phase diagram of the NdAlO 3 –SrTiO 3  pseudo-binary system have been constructed.

Structural Behaviour of Solid Solutions in the NdAlO3-SrTiO3 System