论文部分内容阅读
大坂(Osaka)大学工业科学研究所的结晶学实验室,用X射线衍射法及高分辨力电子显微镜的格子象技术广泛地研究了矿物的不相称超结构。对硫化物(磁黄铁矿和斑铜矿—蓝辉铜矿族矿物)及硅酸盐(斜长石、多铝红柱石和蓝方石)的研究结果表明,大多数不相称超结构由周期性反相晶畴所组成,而反相边界可能变成与该晶畴成分稍微不同的一个带。这种不相称超结构被认为是原子替代的有序化过程或高温形式下无序结构的缺陷,使两个具有相称超结构的稳定相可能出现不混溶的先兆。
The Laboratory of Crystallography at the Osaka Institute of Industrial Science has extensively studied the disproportionate superstructure of minerals by X-ray diffraction and grid-like techniques using high-resolution electron microscopy. The results of sulphides (pyrrhotite and barite - blue chalcopyrite) and silicates (plagioclase, mullite and bluerock) show that most of the disproportionate superstructures are caused by Periodic inverted domains, while the opposite phase boundaries may become a slightly different band than the domain components. This disproportionate superstructure is thought to be an order of atom substitution or a defect of disordered structure under high temperature, which makes immiscibility possible for two stable phases with the same superstructure.