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The present invention proposes a method for producing a β-SiAlON phosphor, capable of adjusting the β-SiAlON phosphor to have high luminance and desired particle size characteristics. According to the present invention, a method is provided for producing a β-SiAlON phosphor having a chemical formula expressed as Si(6-x)AlxOyN(6-y) : Lnz, where Ln is a rare earth element, 0
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