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引言Mueller(1962)与Thompson(1969)的热力学研究和Ghose(1965)的结晶学论著给予了矿物学中迅速发展的分支以新的促进。Virgo和Hafner(1969)与Saxena和Ghose(1971)运用穆斯堡尔方法研究了斜方辉石,占位数据已被用于解决许多矿物和岩石学问题,例如用来估计辉石的热力学溶体性质和推断岩石的冷却史。但是单斜辉石矿物学的研究并没有取得同样的进展,特别是穆斯堡尔方法已被证明不能令人满意地用于Ca辉石。鉴于这一点,我们对单斜辉石进行了详细的X射线结晶学研究,成功地测定了非等效的M1和M2位置上
Introduction The thermodynamic studies of Mueller (1962) and Thompson (1969) and the crystallography of Ghose (1965) have given new impetus to the rapidly growing branch of mineralogy. The orthopyroxenes were studied using the Mössbauer method by Virgo and Hafner (1969) and Saxena and Ghose (1971). The mass-bearing data have been used to solve many mineral and petrological problems, for example, to estimate the thermodynamic solubility of pyroxene Nature and infer rock cooling history. However, the same progress has not been made in the study of clinopyroxene mineralogy. In particular, the Mossbauer method has proven to be unsatisfactory for Ca-pyrrole. In view of this, we conducted a detailed X-ray crystallographic study of clinopyroxene and successfully measured the unequal M1 and M2 positions