GROWTH OF EMERALD CRYSTALS FROM PBO.V2O5 FLUX

被引：9
作者：
OISHI, S
HIRAO, M
机构：
[1] Department of Chemistry and Material Engineering, Faculty of Engineering, Shinshu University, Nagano, 380, Wakasato
来源：
JOURNAL OF MATERIALS SCIENCE | 1991年 / 26卷 / 23期
关键词：
D O I：
10.1007/BF02387821
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The flux growth of emerald crystals by slow cooling in the PbO.V2O5 flux is reported. The crystals exhibited the typical emerald-green colour, were up to 1.8 mm in size and transparent. Their form was a regular hexagonal rod bounded by the well-developed {0001} and {1010BAR} faces. The solubility of emerald in PbO.V2O5 was also investigated; about 9.0 g emerald was dissolved in 100 g PbO.V2O5 at 1200-degrees-C. The solubility decreased gradually with decreasing temperature. Taking the solubility data into account, the presence of undissolved particles in the solution was found to be a necessary condition for the growth of large emerald crystals. Unsaturated solution at a soak temperature produced good and relatively small emerald crystals in a subsequent cooling experiment. Advantages of the PbO.V2O5 flux are also mentioned. Emerald crystals showing various kinds of imperfections, and even good crystals, were also present.
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页码：6401 / 6407
页数：7
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