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PROBLEM TO BE SOLVED : To provide a yellow phosphor that significantly improves the spectral luminous efficiency compared to YAG : Ce, has a narrow light emission peak for good color purity, and increases light emission intensity without inducing an incidental phase during composition. SOLUTION : A yellow phosphor mainly contains a crystal formed of a compound represented by the formula (1) : Ln4-x(EuzM1-z)xSi12-yAlyO3+x+yN18-x-y with 0.5≤x≤3, 0
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