论文部分内容阅读
重砂鉴定是矿物鉴定的重要方法之一。由于在风化、搬运、样品加工等过程中一些重砂矿物物理性质不稳定,用于矿物鉴定的特定物理特征常常不明显,造成重砂矿物鉴别困难。特定微化学反应为鉴别这类矿物提供了快速、简便、准确手段。笔者根据多年来对黔东南地区重砂样品的鉴定工作实践,并参考前人的研究资料,讨论了铜、铅、锌金属矿物微化反应特征在重砂鉴定中的指示作用:黄绿色叶片状的硫氰酸汞铜结晶指示了待测矿物中铜元素的存在;柠檬黄色六边形片状的碘化铅晶体沉淀指示了待测矿物中铅元素的存在;毛十字状、雪花状及羽毛状硫氰酸汞锌复盐沉淀指示了待测矿物中锌元素的存在。
Heavy sand identification is an important method of mineral identification. Due to the unstable physical properties of some heavy grit minerals during weathering, handling and sample processing, the specific physical characteristics used for mineral identification are often not obvious, resulting in difficulties in identifying heavy grit minerals. Specific microchemical reactions provide a quick, easy and accurate means of identifying such minerals. According to the practice of identification of heavy sand samples in southeastern Guizhou Province over the years, and based on the previous research data, the author discusses the indication of the micro-chemical reaction characteristics of copper, lead and zinc minerals in the identification of heavy sand: yellow-green leaf-like Mercuric Thiocyanate crystals indicate the presence of copper in the minerals to be tested; precipitation of lemon yellow hexagonal flaky lead iodide crystals indicates the presence of lead in the minerals to be tested; hairy cross, snowflakes and feathers Like mercury thiocyanate thiocyanate double salt precipitation indicates the presence of zinc in the mineral under test.