铬尖晶石类矿物由于外表特征相似,难以用物理特点进行种属划分,所以常用的是化学分类。因此,就要对化学分析成果进行必要的整理、计算和图解研究。目前使用的计算方法,仍然是P.E.斯蒂文斯1944年在《西半球某些铬铁矿的成分》一书中提出的计算方法(表1)。 Chromium spinel minerals due to the appearance of similar features, it is difficult to use physical characteristics of species, so commonly used chemical classification. Therefore, it is necessary to make the necessary chemical analysis of the results of collation, calculation and graphic research. The calculation method currently in use remains as the calculation method proposed by P.E. Stevens in 1944 in the book “Compositions of Certain Chromites in the Western Hemisphere” (Table 1).