| abstract |
The embodiment of the present invention is characterized in that at least the element D, the element A1, the element AX, the element SX and the element NX (D is Mn, Ce, Pr, Nd, Sm, Eu, Tb, Dy, Ho, Er, Tm and Yb Wherein A1 represents one, two or more elements selected from the group of divalent metals not contained in D, SX represents one, two or more elements selected from the group of tetravalent metals, Two or more elements selected from the group of trivalent metals and NX represents one, two or three members selected from the group O, N, S, C, Cl, F, (Sr a Ca 1-a ) Si 2 Al 2 N 6. The light emitting material contains an inorganic material having the same crystal structure as Sr (Sr a Ca 1-a ) Si 2 Al 2 N 6 . |