闪锌矿中杂质Fe存在形式的重新认识

闪锌矿作为一种重要的金属硫化物已得到广泛的研究，但在对闪上矿中杂质Ｆｅ存在形式的认识上却存在许多问题。本文对不同含Ｆｅ量的天然闪锌矿测定并分析了Ｆｅ的Ｋ边ＥＸＡＦＳ谱，同时对低温光吸收谱及穆斯堡尔进行了研究。结果表明，Ｆｅ在闪锌矿中主要以六配位形式存在。

NEW COGNITION OF THE EXISTING FORM OF IMPURITY Fe IN SPHALERITE

As an important metal sulfide, sphalerite has been widely studied. However, there are many questionable points about the existing form of iron in sphalerite. The K-edge EXAFS spectra, optical absorption spectra and Mossbauer spectra of Fe in sphalerite differing in Fe contents are examined. The results show that the impurity Fe in sphalerite exists mainly in the form of sixfold coordinated species The impurity Fe in sphalerite is mostly in the transition-state exsolution FeS micro-regions, which measures about nanometers to micrometers in size, some is in the exsolution FeS regions, with the size bigger than micrometer and the rest is interstitial to, or isomorphically substitute Fe in sphalerite. This is different from our common knowledge. With the new cognition, we have solved the problem of optical absorption spectra being seriously incompatible with the results frorp crystal field theory.