中国(内モンゴル自治区)吉蘭泰塩湖産透石膏の蛍光について

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Luminescence properties of selenite from the Jirantai Saline Lake, Inner Mongolia, China were studied. Almost all of the selenite from this locality fluoresces either cyan white (sample name: MGW) or yellow (sample name: MGY) under both long- and short-wave ultraviolet (UV) light. When the selenite face of section (010) is irradiated with UV light, {111} and {1^^-03} sectors emit fluorescence, but {110} sector does not. Photoluminescence (PL) emission and excitation spectra at the room temperature are as follows: The PL emission spectrum of the selenite MGW shows bluish green emission peak at approximately 502nm, and the PL emission spectrum of the selenite MGY red emission peak at approximately 670nm. The colors observed with the naked eye and the spectrometer are not equivalent. The excitation spectrum of MGY shows that MGY fluoresces under not only UV light but visible light, and especially it shows the maximum luminescence efficiency under purple light (398nm). The excitation spectrum of MGW shows that MGW fluoresces under not only UV light but visible light as well as MGY, and it shows the maximum luminescence efficiency under blue light (420nm).
2010-11-25

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