Influences of neutral oxygen vacancies and centers on α-quartz
Li Hui-Rana), Cheng Xin-Lu†a),b), Zhang Honga),c), Zhao Fengd)
       
Absorption spectra for the α -quartz with centers: (a) 1– V O, (b) 2 a – V O, (c) 2 b 1– V O, (d) 2 b 2– V O, and (e) 2 b 3– V O.