Disclosed are UV protective compositions comprising BLT crystals having the formula Bi(4-x)La(x)Ti(3-y)Fe(y)O12, wherein x is between 0.1 and 1.5 and wherein y is between 0 and 2. There are also disclosed compositions comprising nanoparticles of such BLT crystals, the nanoparticles being optionally dispersed in a polymer matrix. Methods of preparation and uses of such compositions are also provided.
