The Study On The Crystal Behavior Of Nano-Micron Pyrite Whisker

Nano-micro pyrite whiskers are pyrite minerals that exhibit meso-scale crystal growth. By studying this phenomenon we can understand the nano-micro mineral accumulation mechanism of meso-scale mineral crystal growth and also the transformation of nano-materials in a certain physical and chemical conditions. At the same time, studying of nato-pyrite crystallization in different conditions can provide a scientific basis which reveals the conditions of nano-micro material mineralization. In addition, the scientific data of nato-pyrite, which has multi-morphology, has important meaning in guiding the development and utilization of minerals.In order to reveal the growth of whisker-like crystallization behavior of the pyrite, we have carried out the formation of pyrite whiskers and the basic conditions for macro-geological background research, including natural pyrite whiskers, the formation of environmental studies and the simulation of the growth of pyrite whiskers. Experimental study on the simulation of the growth of pyrite whiskers discusses the aggregation mechanisms of nano-micron pyrite whiskers.Through Geological Survey, we study rocks that contain naturally created whiskers. Nano-pyrite whiskers coexist with mineral ores in mines and cause gold minerals and the inclusion of barite. We believe that natural pyrite whiskers in GengZhuang are the result of the effect of hydrothermal injection. Hydrothermal features and injected directly influence the whisker growth.The study of natural nano-pyrite and the environment when they form shows the morphology of the whiskers as well as composition and structural features that are recorded by hydrothermal evolution. Simply, straight whisker growth is a standard type of growth in a stable growth environment. Beads shaped like OuJie Pubang rods are a thicker standard type and develop in a meta-stable environment. Pyramid shaped crystals develop under relatively high concentration conditions in an unstable environment. Whisker morphology of pyrite has typomorphic meaning that is an important symbol which identifies the geological environment and the fluid characteristics.We carried out an experiment of the growth of pyrite whiskers using the heating-Sulfide method and thermal conversion-decomposition method. In the heating-Sulfide method, when the temperate reached360℃, whisker formation occurred. In the thermal conversion-decomposition experiment the whiskers formed at380℃. They both formed whiskers under conditions of lower temperatures than those in the same kind of crystals. We reached the conclusion the whiskers are the same crystal growth at a relatively low temperatures.We analyzed and discussed the crystallization of pyrite whisker growth behavior, using mineralogy, geochemistry, crystal growth and modern nano-science theory. We think that the natural pyrite whiskers grow according to heterogeneous nucleation, and (Oil),(101), and (210) of barite are selected the base surface. Simulation experiments with homogeneous nucleation of whisker mainly in a closed container in a free growth pattern of growth. Natural whisker growth experienced a growth of secondary thickening, multiple stacking growth process, reflecting the pulse of hydrothermal features. While in simulation experiment, the growth of whiskers only experienced on time growth. Whisker growth mechanism under natural conditions varied.Natural pyrite whiskers have both VLS and VS growth mechanism due to the diversity of geological processes, complexity of hydrothermal sources and other factors. In simulation experiments, whisker growth mechanisms are relatively simple. The whisker grows due the heating-Sulfide method according to the VS mechanism and the VLS mechanism during thermal conversion-decomposition.A comprehensive study shows that pyrite whiskers are the linear structure of pyrite-type crystals, as compared to the same kinds of crystals that form at temperatures and saturations that are relatively low the same kinds of crystals grown under different growth conditions. Cubic crystal led to the discovery of minerals of non-equiaxed crystals under specific conditions.Nano-micro crystalline pyrite whiskers are intermediates where the small "critical nuclei" unit self-assembles into a single crystal. Although its morphology is constrained by its internal structure, its symmetry, crystal defects and other characteristics are affected by environmental factors. The difficulty superimposed on each side and the changes of the growth rate ratio of each side under different growth conditions are important reasons for the formation of whisker morphology.The study offers theoretical explanations of whisker specific minerals (pyrite whiskers) and also offers scientific theoretical and practical application value in nano-mineralization crystal-whisker growth and whisker material growth.