黄铁矿与石英含金机理探讨

从晶体结构化学角度出发，分析了金的电子结构及性质、黄铁矿晶体结构特点、二氧化硅的电子结构特点和石英晶体表面特征；探讨了Au^＋和Au^－离子形式分别替代Fe^2 离子和S^2-离子的形成机理以及以可见金方式在黄铁矿中的赋存机制；认为金在黄铁矿中的富集主要与其晶体结构有关，特别是与黄铁矿中Fe-S，S-S，Au-S和Fe-Au键的电子结构特点有关；应用稳定配合物的18电子规则和晶体生长的界面相模型探讨了石英含金机理；研究表明，石英含金不仅与石英表面的结构、内部缺陷和表面特征有关，还与石英生长的环境有关，尤其是与石英表面键的电子结构特点有关，并主要受石英晶体生长过程中的界面相的控制。

MECHANISM OF GOLD OCCURRENCE IN PYRITE AND QUARTZ CRYSTALS

On basis of electron structure and property of gold, characteristics of pyrite crystal structure, electron structure and characteristics of silica and surface feature of quartz crystal mechanism of gold occurrence in pyrite and quartz is discussed. Au + and Au - ion replace Fe 2+ and S 2- and vissible gold can be formed in pyrite. Gold concentration in pyrite is mainly related to the pyrite crystal structure, especially to F S,S S,Au S and Fe Au bonds. According to 18 electron regulation about assorting meterial and the interface phase model of crystal growth gold occurrence in quartz crystal is not only related to surface structure, inner defect of quartz crystal grouth but also to the quartz crystal growth environment, especially to electron structure of surface bonds of quartz crystal. Trap of gold in quartz is maily controled by interface phase during growth.