| abstract |
A material, comprising a garnet having the composition represented by the formula A 3 -xB 5 O 12 :D x and a barium-containing oxide. In the garnet A 3-x B 5 O 12 :D x , A is selected from lutetium, yttrium, gadolinium, terbium, scandium, another rare earth metal or mixtures thereof. B is selected from aluminum, scandium, gallium, indium, boron or mixtures thereof. D is at least one dopant selected from chromium, manganese and rare earth metals, particularly cerium, praseodymium or gadolinium. The dopant is present with x is 0 ≤ x ≤ 2. |