久辉铜矿的透射电镜研究

A TRANSMISSION ELECTRON MICROSCOPIC STUDY OF DJURLEITE

根据TEM研究,发现产于江西东乡的“辉铜矿”内含有与之紧密共生的久辉铜矿。高分辨象揭示出久辉铜矿的晶体结构,相当于由似六方辉铜矿结构作较长周期的重复堆垛所构成的一种类似于类多型的结构,其中并存在堆垛层错缺陷。此外,作者还发现在久辉铜矿中有与之成拓扑衍生关系的另一种相畴,其b为久辉铜矿的1/4。作者认为该相可能是介于久辉铜矿与辉铜矿之间的亚稳态中间相,并称其为变久辉铜矿(metadjurleite)。

It has been known from the transmission electron microscopic study that the 'chalcocite' ore from Dongxiang of Jiangxi Province consists of chalcocite and djurleite. High-resolution transmission electron microscopic(HRTEM) image shows that the crystal structure of djurleite is similar to a polytypoid structure which is constituted by a hexachalcocite-like structural layer in the long-period stacking way and a'stacking fault occurs in it. In addition, there is another phase domain in topotaxic relationship with djurleite, b=l/4b_(dj), which is considered a metastable intermediate phase between chalcocite and djurleite. Therefore, it is called 'metadjurleite'.