绿泥石族矿物热学性质的研究  

A STUDY ON THE THERMAL BEHAVIOUR OF CHLORITE-GROUP MINERALS

作　　者：杨雅秀 

机构地区：[1]国家建材局地质研究所,北京100010

出　　处：《矿物学报》1992年第1期36-44,共9页Acta Mineralogica Sinica

摘　　要：本文提供了不同成分的三八面体和二八面体绿泥石矿物的热谱、相应化学成分及结构式,并对它们进行了热转变产物的研究。实验证明,DTA曲线特征及热转变产物主要取决于矿物的化学成分。Mg-绿泥石有640℃±和840℃±两个脱羟吸热谷和870℃±的强放热峰,其转变产物为镁橄榄石和顽火辉石;Fe-绿泥石只有一个550℃±的脱羟吸热谷,并转变为赤铁矿和铁尖晶石;Al-绿泥石有一个540℃±的脱羟吸热谷和920℃±的放热峰,转变为富铝红柱石。This paper presents the thermal curves, relevant chemical compositions and structural formulae of various tri- and dioctahedral chlorites. Thermal transformation of typical chlorites has been studied. Experiments indicate that the characteristics of DTA curves and the products of thermal transformation principally depend on the chemical composition of minerals. Mgchlorite has two dehydration endothermic peaks at 640℃+ and 840℃+ and one strong facies-change exothermic peak at 870℃+; forsterite and enstatite are the products of thermal transformation. Fe-chlorite has only one dehydration endothermic peak at 550℃± and it has been transformed into hematite and hercynite. Al-chlorite has one dehydration endothermic peak at 540℃± and one exothermic peak at 920℃± and it has been transformed into mullite.

关 键 词：绿泥石 矿物 热分析 三八面体 

分 类 号：P578.962[天文地球—矿物学]