Solubility and optical activity of Bi12SiO20 crystals |
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| Authors: | Xiaoling He Haitao Zhou Weining Zhou Zhanggui Hu Changlong Zhang Hande Huo Jinliang Wang Yanbin Zuo Fuhua Lu |
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| Institution: | 1. Guilin Research Institute of Geology for Mineral Resources, Guilin 541004, China;2. Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100080, China |
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| Abstract: | In this paper the solubility and optical activity of Bi12SiO20 (BSO) single crystals grown in aqueous NaOH under hydrothermal conditions were reported. BSO was found to have a positive solubility coefficient from 350 to 400 °C in 0.5–3 M NaOH, as well as a positive dependence on mineralizer concentration. The reason why additional SiO2 should be introduced in the mineralizer to grow high quality BSO was analyzed. High quality and colorless BSO crystals were grown using 4 M NaOH as a mineralizer and additional 3 wt% SiO2 introduced in the mineralizer. Results showed that the optical activity of hydrothermal colorless BSO was superior to that of BSO grown by the Czochralski (Cz) method. |
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