| 摘要 |
To provide a new phosphor of which fluorescence contains much red light component and has a large full width at half maximum, the crystal phase represented by the formula [I] is included in the phosphor. R3−x−y−z+w2MzA1.5x+y−w2Si6−w1−w2AlW1+w2Oy+w1N11−y−w1 [I] (R represents La, Gd, Lu, Y and/or Sc, M represents Ce, Eu, Mn, Yb, Pr and/or Tb, A represents Ba, Sr, Ca, Mg and/or Zn, and x, y, z, w1 and w2 are the numeric values in the following ranges: ( 1/7)≰(3−x−y−z+w2)/6<(½), 0<(1.5x+y−w2)/6<(9/2), 0<x<3, 0≰y<2, 0<z<1, 0≰w1≰5, 0≰w2≰5, and 0≰w1+w2≰5)
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