PHOSPHOR

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PROBLEM TO BE SOLVED : To provide a phosphor by using a carbonate oxide (phase II) of a rare earth element as a parent compound.SOLUTION : The pure carbonate oxide (phase II) of the rare earth element can be obtained at a low temperature of ≤600°C at which its production is impossible by conventional means, by using an alkali metal salt as a flux together with the carbonate oxide of the rare earth element. Thereby, it is possible to obtain the carbonate oxide (phase II) of the rare earth element at the low temperature easily, and further to obtain powder having a high crystallinity. Thereby, by activating the carbonate oxide (phase II) of the rare earth element with various light-emitting ions, it is possible to obtain phosphors showing variously colored light.