| 摘要 |
The present invention aims at providing a chemically stabilized inorganic phosphor having an orange or red emission characteristic at higher luminance, and a light emitting instrument adopting the phosphor, for a lighting instrument excellent in color rendering property and for an image displaying apparatus excellent in durability. The solving means resides in provision of a fundamental phosphor comprising: a crystal represented by A<SUB>2</SUB>Si<SUB>5-x</SUB>Al<SUB>x</SUB>O<SUB>x</SUB>N<SUB>8-x </SUB>(A is a mixture of one kind or two or more kinds of element(s) selected from Mg, Ca, Sr, and Ba; and x is a value between 0.05 inclusive and 0.8 inclusive); and a metallic element M (M is one kind or two or more kinds of element(s) selected from Mn, Ce, Nd, Sm, Eu, Tb, Dy, Ho, Er, Tm, and Yb) dissolved, in a solid state, in the crystal.
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