Synthesis and structural characterisation of Sr3Al10SiO20 by XRD and solid-state NMR

The strontium aluminosilicate Sr3Al10SiO20 has been synthesised by a spray-drying process and characterised by powder X-ray diffraction. It crystallises in the monoclinic I2/m space group with the cell parameters a=14.394(2) ?,b=11.189(2) ?,c=4.904(1) ?,BETE=90.793 (1)°,Z=2. Its structure is built of double AlO6 octahedra chains interconnected by AlO4 and SiO4 tetrahedra forming a three-dimensional channel-like network where the strontium cations are located. The distribution of aluminium and silicon cations in the different tetrahedral and octahedral sites of the structure was probed using 29Si, 27Al MAS and 3Q-MAS NMR.