Structural Evolutions in the Sr1-xBaxZrSe3Series

Abstract

Compounds in the Sr1-xBaxZrSe3series, where 0≤x≤0.68, were prepared from SrSe, BaSe, Zr, and Se in evacuated and sealed silica ampules, at temperatures between 900 and 950°C. An amorphous Zr-Se phase is competitively formed in the reaction thus synthesis mixtures require 20 and 40% mole excess of Zr and Se, respectively. The Sr1-xBaxZrSe3compounds adopt the NH4CdCl3structure type, containing columns of double edge-sharing ZrSe6octahedra linked by distorted (Sr, Ba)Se9tricapped trigonal prisms. For 0.68