摘要
75年北大黄福生等同志在该铁矿工作时,已发现在磁铁石英岩中有两种碱性闪石,由于它们产在富铁矿体中及其附近,因而引起了在该区工作的各单位同志的注意。为了研究它们和富铁矿成因关系及对其确切定名,我们对其中一种碱性闪石进行了较详细的研究,确定为钠——钙角闪石族的高铁——蓝透闪石。
Ferri-wischite was discovered in the iron deposit of Sijiaying of Luanxian in East Hebei.Its cystalloqhemical formula,according to the data of the chemical anal ysisis,is(Na1.00K0.20Ca1.53Mn0.08Fe2 +0.11)2.00(Fe2 +0.53Mg3.21Fe3+1.19A0.07)5.00(si7.99Al9.01 22)(OH)2.00,Z = 2. The cell parameters are: a =9.74A,b = 17.89, c = 5.3lA., (3 = 103.8°. The space group is C32h-C2/m. The chief X-ray diffraction lines are: 8.369(10)-3.406(7)-3.106(7)-2.588(9)-1.584(8).The infrared spectra for ferri-winchite exhibit two definite absorption bands. The first baud is between 820-1300 cmm-1 due to the stretching vibration of Si-O, with maximum values of 975 and 995 respectively. The second band,which is at tributable to the distortional-vibration of Si-O-Si,is detected between 240-600 cm-1,with a maximum value of 445 cm-1. A distinct exothermic effect is observed between 300-630℃, indicating the oxidation of Fe2+to Fe3 + . A deep endothermic valley between 995-996℃ can be attributed to the melting of ferri-wischite and the formation of new minerals. The authors, consider that ferri-wiachite is formed from the hydrothermal process of migma-tization.
出处
《吉林大学学报（地球科学版）》
EI
CAS
1983年第3期97-106,共10页
Journal of Jilin University：Earth Science Edition
