含钒伊利石晶体结构中的价键分析  

Valence-bond analysis of vanadium-bearing illite crystal structure

作　　者：江路通 冯安生[1] 张成强[1] 张红新[1] 赵恒勤[1] JIANG Lutong;FENG Ansheng;ZHANG Chengqiang;ZHANG Hongxin;ZHAO Hengqin(Zhengzhou Institute of Multipurpose Utilization of Mineral Resource,CAGS,China National Engineering Research Centerfor Utilization of Industrial Mineral,Zhengzhou Henan 450006,China)

机构地区：[1]中国地质科学院郑州矿产综合利用研究所,国家非金属矿资源综合利用工程技术研究中心,河南郑州450006

出　　处：《化工矿物与加工》2020年第12期49-52,共4页Industrial Minerals & Processing

基　　金：河南省科技攻关基础与前沿研究项目(162300410013);江西于都地区钨等矿产绿色利用调查评价项目(DD20190625)。

摘　　要：对某含钒伊利石型石煤进行微区能谱分析、电子探针分析、XPS分析,结果表明伊利石型含钒石煤矿中存在不同价态的钒。为探究不同价态钒在硅酸盐或铝硅酸盐矿物晶格中的存在状态和稳定情况,对含钒伊利石中晶体结构的价键进行了计算,结果表明:Al 3+更多以六面体配位存在,但4配位比6配位稳定,并且铝相对于钒优先进入硅酸盐矿物中;V3+几乎均以6配位的形式替代铝氧六面体中的铝,其他存在形式较少;V3+和V4+在V3+替代后的基础上部分替代四面体,六面体中的Al 3+、V3+、V5+有能力替代硅氧四面体中的硅。Micro-area energy spectrum analysis,electron probe analysis and XPS analysis of an illite-based coal ore containing vanadium were carried out.The test results show that there are different valences of vanadium in illite-based coal ores.In order to investigate the existence and stability of vanadium with different valence in the crystal lattices of silicates or aluminosilicates,the valence bond of the crystal structure in vanadium-bearing illite was calculated.The results show that Al 3+exists mainly with hexahedral ligand,but existence with tetracoordination is more stable than hexacoordination and aluminum has priority to vanadium while entering silicate minerals,where V3+is more likely to replaces aluminum in the alumina hexahedron in the form of hexacoordination than other forms.V3+and V4+partially replace the tetrahedron upon the V3+replacement,and Al 3+,V3+and V5+in the hexahedron are capable of replacing silicon in silicon-oxygen tetrahedron.

关 键 词：伊利石 钒 铝硅酸盐 价键 类质同象 配位反应 晶体结构 石煤 

分 类 号：TD982[矿业工程—选矿]