Bi_(12)SiO_(20):Cr晶体中Cr离子的氧化态及占位研究  

Research of the Oxidation States and Site Occupancy of Chromium in Bi_(12)SiO_(20):Cr Cryatal

作　　者：何小玲[1] 霍汉德[1] 王金亮[1] 吴文渊[1] 

机构地区：[1]中国有色桂林矿产地质研究院有限公司,广西超硬材料重点实验室,国家特种矿物材料工程技术研究中心,广西桂林541004

出　　处：《超硬材料工程》2014年第5期38-41,共4页Superhard Material Engineering

基　　金：广西自然科学基金(2013GXNSFBB053004;2012GXNSFAA053215)

摘　　要：采用温差水热法,以NaOH溶液为矿化剂,以Cr2O3为掺杂剂进行了BSO:Cr晶体的生长。与纯BSO晶体相比,掺Cr明显降低了BSO晶体的透过率且紫外截止波长发生了红移,研究还发现水热法生长的BSO:Cr晶体存在三个氧化态:Cr4+,Cr3+和Cr2+,根据配位数与多面体之间的理论关系认为Cr4+取代Si位,Cr3+和Cr2+取代Bi位。Bi12SiO20：Cr crystal has been grown by temperature hydrothermat technique with NaOH as mineralizer and Cre（）：~ as dopant. Compared to pure BSO crystal, transmittance of the BSO crystal with Cr decreased significantly and a redshift was served in its Uv cutoff wavelength. The research also found that the BSO：Cr crystal hydrothermal technique has 3 oxidation states which are Cr1＋ ,Cr34 and Cr2＋. Based the theoretical relation between coordination number and polyhedron, it is believed tha has been replaced by Cr4＋; and Bi has been replaced by Cr3＋ and Cr2＋.

关 键 词：Bi12SiO20:Cr晶体 宝石合成 水热法 氧化态 占位 

分 类 号：O78[理学—晶体学]