| 摘要 |
Provided is a phosphor particle group of divalent europium-activated oxynitride green light emitting phosphor particles each of which is a &bgr;-type SiAlON substantially represented by a general formula: EuaSibAlcOdNe, where 0.0055≦̸a≦̸0.4, b+c=12, d+e=16, wherein 60% or more of the phosphor particle group is composed of the phosphor particles in which a value obtained by dividing a longer particle diameter by a shorter particle diameter is greater than 1.0 and not greater than 3.0. A high-efficiency and stable light emitting apparatus using a &bgr;-type SiAlON, which includes a light converter using the phosphor particle group, and a phosphor particle group therefor are also provided.
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