| 摘要 |
Provided is a novel yellow or orange phosphor that is useful in applications of white-light-emitting LEDs. The phosphor is characterized by including a crystalline phase having the composition expressed in formula [1] below and in that the crystal system thereof is the hexagonal crystal system. MmAaAlbSicN40 [1] (In formula [1] above, M represents an activating element, A represents one or more kinds of elements selected from the group consisting of alkaline earth metal elements, and m, a, b, and c are values that satisfy the following expressions independently of each other: 0 < m ≤ 0.2, 1.2 ≤ a ≤ 5.6, 2.4 ≤ b ≤ 11.2, 18.8 ≤ c ≤ 27.6.) |
