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Replacement of lanthanum in LaPO4:normalEu phosphors by barium‐lithium pairs false(La1−2xBaxEuxLixPO4false) leads to interesting emission characteristics: (i) line emission typical of Eu+3 for all ultraviolet excitation but most pronounced at short wavelength; (ii) A blue band for excitation wavelengths longer than 266 nm, for certain values of x; (iii) a uv band prominent under the same conditions favoring the blue emission. Results of x‐ray and microscopic examination indicate a single‐phase material. It is concluded that the line emission is due to an Eu+3 center which receives energy from the host, the bands to different Eu+2 centers.

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