| 摘要 |
A phosphor for vacuum ultraviolet ray-excited light-emitting elements which comprises a compound represented by the following formula (I): <?in-line-formulae description="In-line Formulae" end="lead"?>M<SUP>1</SUP><SUB>1-a-b-c-d</SUB>M<SUP>2</SUP><SUB>a</SUB>M<SUP>3</SUP><SUB>b</SUB>M<SUP>4</SUP><SUB>1-e</SUB>M<SUP>5</SUP><SUB>11-f</SUB>M<SUP>6</SUP><SUB>c-d+e+f</SUB>O<SUB>19-(b+c+f)/2</SUB> (I)<?in-line-formulae description="In-line Formulae" end="tail"?> (wherein M<SUP>1 </SUP>is at least one element selected from the group consisting of La, Y and Gd, M<SUP>2 </SUP>is at least one element selected from the group consisting of Ce and Tb, M<SUP>3 </SUP>is at least one element selected from the group consisting of Ca, Sr and Ba, M<SUP>4 </SUP>is at least one element selected from the group consisting of Mg and Zn, M<SUP>5 </SUP>is at least one element selected from the group consisting of Al and Ga, and M<SUP>6 </SUP>is at least one element selected from the group consisting of Mn and Eu, and a, b, c, d, e and f are numbers satisfying the conditions of 0<=a<1, 0<=b<=0.6, 0<=c<=0.5, 0<=d<=0.5, 0<=e<1, 0<=f<1, a+b+c+d<1 and 0<c+d+e+f), respectively.
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