Abstract

The process of pyrite formation has been studied by nuclear gamma resonance, X-ray diffraction, and thermogravimetric analysis in combination with thermomagnetic measurements. It has been established at which sulfur content in the charge pyrite begins forming, whether this phase grows smoothly or intermittently with an increase in the sulfur content, what other minerals are formed in this process, and also at what sulfur content in the charge the accompanying minerals practically disappear and pyrite is formed (and, obviously, sulfur remains in the charge). According to the Fe–S phase diagram, pyrite is formed in the range from 37.4 to 60.05 wt % sulfur; i.e., it appears only above a certain critical content of sulfur in the samples. Pure pyrite was obtained at a sulfur content of 60.05 wt % and higher. The synthesis was carried out in a vacuum (~1 Pa) in quartz ampoules at a temperature of 1273 K. According to the research results, pyrite (FeS₂) is formed from pyrrhotite and in pyrrhotite. The data obtained can be used in cosmochemistry.

中文翻译：

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黄铁矿晶体化学特征及其形成条件的研究

摘要

已通过核伽马共振、X 射线衍射和热重分析结合热磁测量研究了黄铁矿的形成过程。已确定装料黄铁矿中的硫含量何时开始形成，随着硫含量的增加，该阶段是平稳增长还是间歇性增长，在此过程中形成了哪些其他矿物，以及伴随的装料中的硫含量是多少矿物实际上消失了，形成了黄铁矿（显然，硫仍然留在炉料中）。根据 Fe-S 相图，黄铁矿的形成范围为 37.4 至 60.05 wt % 的硫；即，它只出现在样品中硫的某个临界含量以上。以 60.05 重量% 或更高的硫含量获得纯黄铁矿。₂ ) 由磁黄铁矿和磁黄铁矿形成。获得的数据可用于宇宙化学。