| abstract |
Disclosed is a phosphor having high luminance, which is composed of M1, M2, M3, M4, a halogen element and O (M1 represents an alkaline earth metal; M2 represents a trivalent metal element; M3 represents an activator element; and M4 represents a tetravalent metal element), with the molar ratio among M1, (M2 + M3), M4, and the halogen element, namely M1:(M2 + M3):M4: halogen element being 1:4:3:a (wherein a is a number within the range of not less than 0.01 but not more than 3). The phosphor can be obtained by firing a metal compound mixture containing M1, M2, M3, M4, and a halogen element (M1, M2, M3 and M4 are as defined above), which additionally contains one or more halides selected from the group consisting of halides of M1, halides of M2 and halides of M3. |