Fluorescent, light emitting element and a light-emitting device

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The phosphor of the present invention is characterized in that it is represented by the general formula : A2MF6 : Mn4+, wherein element A is an alkali metal element comprising at least K, element M is one or more metal elements chosen from among Si, Ge, Sn, Ti, Zr and Hf, F is fluorine, and Mn is manganese, wherein the phosphor comprises a Ca-containing compound on a particle surface.