再论偏岭石与变高岭石的区别——评《天然烧变高岭石中水铝英石的发现》一文  

A Comment on the Difference between Pianlinite and Metakaolinite——On " The Existence of Allophane Heated Metakaolinite" in Acta Mineralogica Sinica

作　　者：刘长龄[1] 陈新邦 覃志安[1] 

机构地区：[1]冶金部天津地质研究院

出　　处：《沉积学报》1997年第4期165-168,共4页Acta Sedimentologica Sinica

摘　　要：《矿物学报》１９９５年第４期发表了何宏平的“天然烧变高岭石中水铝英石发现”一文。该文用核磁共振谱中－７９．０×１０－６附近的谱峰，认为该信号来自水铝英石，而不是来自Ａｌ－Ｓｉ尖晶石。这种说法较合理，因刘长龄早就阐明偏岭石在成岩阶段由水铝英石变来。但是我们不同意“天然煤烧变高岭石经后期水化作用变成水铝英石”的观点，而主张“水铝英石是沼泽相原生沉积的；在成岩作用中转变为偏岭石不是煤烧的，有一些理化性质与变高岭石的不同”The paper "The Existence of Allophane Heated Metakaolinite" was published by He Hongping et al in No4 of Acat Mineralogica Sinica,1995.In the paper,the author thought that the spectrum peak arround 790×10-6 of MASNMR spectra was originated from allophane,not from Al Si spinel.This opinion is relatively rational because Liu Changling had stated that pianlinite originated from allophane during diagenetic stage.Howeuer,we don't agree with the opinion that heated kaolinite became allophane through late hydration,we think allophane is originally deposited in swamp;during diagenesis it changes into planlinite,thus pianlinite is not formed by coal combustion,Some of its physical and chemical properties are different from that of metakaolinite.

关 键 词：偏岭石 变高岭石 水铝英石 核磁共振谱 粘土矿物 

分 类 号：P578.964[天文地球—矿物学]