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无色绿柱石经电子辐照可变成蓝绿色。正常光和异常光振动方向的光谱都表明其颜色可能是蓝色和黄色发色团所致。蓝色发色团是亚稳定态“Maxixe 型”色心。黄色是由于三价铁和氧配位体之间电荷的转移造成的,黄色是稳定的。
Colorless beryl turns into cyan by electron irradiation. The spectra of the normal and extraordinary light vibrations all indicate that the color may be due to blue and yellow chromophores. The blue chromophore is a metastable Maxixe-type color center. Yellow is due to the charge transfer between the ferric and oxygen ligands, and the yellow color is stable.