FLUOROPHORE AND LIGHT-EMITTING DEVICE

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A fluorophore obtained from a europium-activated sialon crystal having an elemental composition represented by formula (1) (Sr1-x, Eux)αSiβAlγOδNω (1) (in the formula, x is 0 < x < 1, α is 0 < α ≤ 4, and β, γ, δ, and ω are numbers such that the converted numerical values when α is 3 satisfy 9 < β ≤ 15, 1 ≤ γ ≤ 5, 0.5 ≤ δ ≤ 3, and 10 ≤ ω ≤ 25), and said sialon crystal comprises at least one kind of non-Eu rare earth element selected from among Sc, Y, La, Ce, Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu in a proportion of 0.1 mass% to 10 mass%. The fluorophore emits green light when excited with ultraviolet light, violet light or blue light.