摘要
待定矿物化学式中阳离子数法是由电子探针分析值求矿物中Fe ̄(3+)、Fe ̄(2+)的新方法。在该方法中,矿物化学式中的阴离子数是唯一已知条件,阳离子数未知,通过本文给出的一系列步骤可以得出实际阳离子数的可能估计。进而求出Fe_2O_2、FeO。该法对Fe_2O_3、FeO的计算结果避免了出现负值,在总体上,该方法的计算结果较其它方法更接近其化学分析值。
The new method proposed by the authors is how to estimate Fe_2O_3 andFeO contents in amphibole and biotite from EMPA data.Although the only knowncondition in the method is the anion numbers in mineral chemical formula, the Fe_2O_3 andFeO values in minerals can be calculated by a series steps(calculations)given in thispaper.The results,may successfully refrain from possible appearing of negative values inother methods and are closer to the values from chemical analysis that obtained by othermethods.The applications of this method in amphibole and biotite are discribed in detail.This method also can be used to estimation of muscovite.
关键词
电子探针
角闪石
黑云母
二价铁
electron microprobe,amphibole, biotite, ferreous and ferric iron,mineral chemical formula