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镁铁矿是一种罕见的交代矿物,发现于安徽秦楼镁夕卡岩Au(Fe、Cu)矿床和陕西木龙沟镁夕卡岩 Fe(Mo、Cu)矿床,它在中国是首次发现。本文对镁铁矿及镁磁铁矿的产出地质条件、矿物共生组合、化学成分、物理性质、X—射线粉晶数据和红外吸收光谱等特征进行了较系统的研究,提供了一批新的数据。镁铁矿含MgO高达13.48％～17.66％,与其共生的矿物主要是斜硅镁石、粒硅镁石、蛇纹石、方解石和镁磁铁矿。镁铁矿的比重为4.537～4.720,反射率R=17.8～18.1,硬度838～900kg/mm~2,晶胞参数为0.8371～0.8379um。对镁铁矿—镁磁铁矿—磁铁矿系列的化学成分和物理性质、晶胞参
Magnesite is a rare metasomatism found in the Au (Fe, Cu) deposits in Qinlou, Anhui Province and the Fe (Mo, Cu) deposits in Mulonggou, Shanxi Province. It was first discovered in China . In this paper, we have systematically studied the production geological conditions, mineral assemblages, chemical compositions, physical properties, X-ray powder crystal data and infrared absorption spectra of mafic and magmatic magnetites and provided a batch of new The data. Magnesite contains up to 13.48% ~ 17.66% of MgO. The symbiotic minerals are mainly skeleosite, peridotite, serpentine, calcite and magnesium magnetite. The proportion of maficite is 4.537 ~ 4.720, the reflectance is 17.8 ~ 18.1, the hardness is 838 ~ 900kg / mm ~ 2 and the unit cell parameters are 0.8371 ~ 0.8379um. On the chemical composition and physical properties of the mafic-magnesian-magnetite series, unit cell parameters