V. Kahlenberg: Sr3(Al0.36Ga0.64)2O6

Crystal Research and Technology

Cryst. Res. Technol. 35 (2000) 1279 - Abstract -

V. Kahlenberg

Fachbereich Geowissenschaften (Kristallographie), Universität Bremen, Bremen, Germany

Sr₃(Al_0.36Ga_0.64)₂O₆ - a new Strontium Aluminum Gallate

The new compound Sr₃(Al_0.36Ga_0.64)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.

Keywords: Strontium Aluminium Gallate

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