【摘要】 模拟天然黄铁矿形成条件和基本过程,利用真空管式炉实验设备,通过热硫化法在250～410℃反应,实验考察不同温度条件下黄铁矿的结晶生长情况。运用扫描电镜、X射线粉晶衍射分析等手段,对实验产物形貌、物相结构特点等进行测试分析。结果表明:250～410℃时均可形成黄铁矿,但250～280℃时黄铁矿结晶程度较差;310～340℃时,可生长出部分晶面;360℃时黄铁矿生长成较为完好的晶体;380℃时黄铁矿结晶成立方体、八面体等自形晶;410℃时可形成结晶好、成分单一的黄铁矿。更多还原

【Abstract】 Natural conditions and formation process for pyrite were simulated.A laboratory vacuum tube furnace heater was used through the thermal curing process between 250℃ and 410℃.Responses were captured from the experimental study at different temperatures under the conditions of pyrite crystallization growth.Using the methods such as scanning electron microscope and X-ray diffraction analysis,the authors analyzed the pyrite in crystal form and structure.The results show that it is formed between 250℃ and 410℃,but it is low in degree of crystallization between 250℃ and 280℃.The partial crystal faces begin to grow between 310℃ and 340℃,and better crystal planes occur at 360℃.It has euhedral crystals that appear as cubes and octahedrons at 380℃.When it is 410℃,the pyrite crystallizes completely with a single composition.更多还原