The strontium aluminosilicate Sr 3 Al 1 0 SiO 2 0 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)Å,b=11.189(2)Å,c=4.904(1)Å,β=90.793(1) o ,Z=2. Its structure is built of double AlO 6 octahedra chains interconnected by AlO 4 and SiO 4 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 2 9 Si, 2 7 Al MAS and 3Q-MAS NMR.