Hydrothermal synthesis and morphology of Ga-bearing tourmaline |
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| Authors: | T V Setkova V S Balitsky O S Vereschagin Yu B Shapovalov |
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| Institution: | 1.Institute of Experimental Mineralogy,Russian Academy of Sciences,Chernogolovka, Moscow oblast,Russia;2.St. Petersburg State University,St. Petersburg,Russia |
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| Abstract: | Ga-bearing tourmaline was originally synthesized in boron, boron–alkaline, and boron–fluorine hydrothermal solutions at a temperature of 600–650°C and pressure of 100 MPa as crystals of spontaneous growth and on seeds. The maximal concentration of Ga2O3 in synthetic crystals reaches ~24.5 wt %. In addition to Ga-bearing tourmaline, Ga-bearing topaz crystallizes in boron–fluorine solution. Ga-bearing albite crystallizes in boron–alkaline solutions, whereas no additional phases are formed in pure boron solutions. |
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