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The fluorescent characteristic and emission spectra of Eu~(2+) in the cubic structureCa_8Zn(SiO_4)_4Cl_2 with three kinds of cation sites is reported.The influence of temperature,Eu~(2+) concentra-tion and excitation conditions on fluorescent properties of Eu~(2+) are studied at 77 and 298 K.Thecoordination number of Eu~(2+) at different sites is obtained.The green and red emission bands arise fromEu_(2+) ions locating on eight- and six- coordinated inequivalent sites respectively.
The fluorescent characteristic and emission spectra of Eu ~ (2+) in the cubic structure Ca_8Zn (SiO_4) _4Cl_2 with three kinds of cation sites is reported. The influence of temperature, Eu ~ (2+) concentra tion and excitation conditions on fluorescent properties of Eu ~ (2+) are studied at 77 and 298 K. The coordination number of Eu ~ (2+) at different sites is obtained. The green and red emission bands arise from Eu 2+ ions locating on eight- and six- coordinated inequivalent sites respectively.