摘要
本文在结构测定的基础上。应用穆斯堡尔谱技术。确定了钛钡铬石和钛钾铬石中铁离子的价态及结晶学位置。测试结果表明钛钾铬石中Fe的相对含量Fe^(2+)>Fe^(3+),而钛钡铬石中Fe^(2+)<Fe^(3+)。初步分析了M_2四面体位置,可能存在次近邻效应。对Mg(?)Fe之间可能的类质同象替代作了估算。
Lindsleyite and mathiasite were examined by Mssbauer spectroscopy at room temperature. The preliminary results show that iron has two valence states: Fe^(2+) and Fe^(3+). Both Fe^(2+) and Fe^(3+) occupy respectively the octahedral M(3) and tetrahedral M(2) sites in the crystal lattice. The occupancy ratios of Fe^(2+) and Fe^(3+) in the lindsleyite and mathiasite have been experimentally determined. Finally their chemical formulae are discussed.
出处
《矿物学报》
CAS
CSCD
北大核心
1990年第4期370-375,共6页
Acta Mineralogica Sinica
关键词
钛钡铬石
钛钾铬石
穆斯堡尔谱
lindsleyite
mathiasite
Mssbauer spectra
valence state
