It is found that Fe(Ⅱ) can be used as a characteristic component of ludwigite and its content has a positive correlation with its mineral s purity.
分析了东北某地硼矿石中硼镁铁矿物质组成 ,发现Fe(Ⅱ )可作为硼镁铁矿的特征性成份 ,且其含量与矿物的纯度成正相关。
Two new Ti-varieties all occur in picroilmenite which contains crystallographica.
新发现的两个矿物（变）种均产出于具叶片状尖晶石出溶体的镁钛铁矿中。