Luminance: Project light upon in the ultraviolet ray wave under have thin Huang green arrive blue fluorescence, short-wave fluorescence not obvious, the X shoots line irradiation to descend also have no give out light phenomenon obviously.

• 发光性：在紫外线波照射下有淡黄绿到蓝色的荧光，短波荧光不明显，X射线照射下也无明显的发光现象。