| abstract |
A phosphor of formula I is included in a phosphor composition in a lighting apparatus capable of emitting white light, n Ca 3-x-z Sr x Ce z M 2 1 M 2 AlSiO 12 (I)n whereinn M 1 is Hf, Zr, or a combination thereof; M 2 is Al, or a combination of Al and Ga; z<3−x; and 0.2>x≧0. n nn The lighting apparatus includes a semiconductor light source in addition to the phosphor composition. |