<p>A phosphor composition is disclosed comprised of phosphor crystals which consist essentially of oxygen and a combination of metals satisfying the relationship: Li2Hf1-x-y-zZrzSnyTixLw where L is at least one rare earth; w+x+y collectively are 0 to 0.2; and z is up to 0.2. The composition has utility in an intensifying screen for producing a latent image in a silver halide radiographic element when imagewise exposed to X-radiation.</p>
