Sr3(Al0.36Ga0.64)2O6 - a new Strontium Aluminum Gallate

Abstract

The new compound Sr3(Al0.36Ga0.64)2O6 has been synthesized and studied by single crystal X‐ray diffraction. The material crystallizes in the cubic space group Pa‐3 (No. 205) with Z = 24 and a lattice constant a = 16.0195(12)Å. The structure is isotypic with Ca3Al2O6 and is characterized by isolated, highly puckered, six‐membered (Al,Ga)O6 rings. The rings are linked by strontium cations which are coordinated by 6 to 9 oxygen ligands. Alternatively, the structure can be regarded as an example for a defect ABO3‐perovskite with 12.5% vacancies in the A‐sublattice and 25% oxygen vacancies.