摘要
铁橄榄石集合体为无根岩石。外观呈铁黑色,风化面呈亮栗褐色。本文对铁橄榄石集合体的形态特征、物理性质和化学成分进行了研究。通过化学式的计算,其化学式为:(Mg_(0.0168)Fe_(0.9802)Mn_(0.003))_2[SiO_4],证明其为铁橄榄石的端员组份。此外,还对其进行了穆斯堡尔谱分析、X射线粉晶衍射分析和红外光谱分析。其穆斯斑堡尔谱分析结果与人工合成的铁橄榄石数据相近,它的衍射数据及计算的晶胞参数也与JCPDS所提供的标准数据非常接近,这些进一步证明了铁橄榄石集合体的成分接近于铁橄榄石端员组份。
Fayalite aggregate is a roofless rock black in color and consists almost exclusively of fayalite——(Mg_(0..169) Fe_(0.9802)Mn(0.003)_2 [SiO_4]. The crystals are tabular and columnar in form with the largest grain size reaching 10 mm. The aggregate shows over-cooling texture with dendrite. In this paper, systematically mineralogic data are given about this rare fayalite whose composition approaches the end and member component of fayalite.
出处
《岩石矿物学杂志》
CAS
CSCD
1989年第1期88-93,共6页
Acta Petrologica et Mineralogica