We report a facile route to multicomponent complexes of [M{(mu-ddbfo)(2)Al(OSiR3)(2)}(2)] (M = Ba, Sr; ddbfoH = 2,3-dihydro-2,2-dimethylbenzofuran-7-ol; R = Ph, (OBu)-Bu-t) as new efficient single-scnirce routes to barium and strontium celsian feldspar Ba(Sr)Al2Si2O8. The resulting complexes were characterized by elemental analysis, IR and NMR spectroscopy, and single-crystal X-ray diffraction. These compounds calcined at 1100 degrees C to give porous material Ba(Sr)Al(2)iSi(2)O(8)center dot 2SiO(2) as an amorphous silica matrix containing spherical oxide nanocrystals of celsian feldspar of ca. 5 nm diameter, as evidenced by transmission and scanning electron microscopies.