CAJ | 학술논문

本文对产于俄罗斯希宾地区的单斜星叶石进行了不同的温度条件下的穆斯堡尔光谱效应研究.通过在温度分别在298 K,180 K和80 K条件下的分析,发现单斜星叶石由2个Fe2+和1个Fe3+四极双峰组成,并进行了单斜星叶石中的畸变参数包括八面体键角(σ2)和键长变量(△)的计算.但是,在两个畸变参数之间存在着明显的差异,将无法对它们的穆斯堡尔参数和四极双峰进行指派.本文对温度在同质异能位移和四极分裂中的作用进行了探讨,根据通过穆斯堡尔效应和f(Fe3+(O))/f(Fe2+(O))的平均值获得的三价铁对全铁的比值,改写了单斜星叶石的化学式.
본문대산우아라사희빈지구적단사성협석진행료불동적온도조건하적목사보이광보효응연구.통과재온도분별재298 K,180 K화80 K조건하적분석,발현단사성협석유2개Fe2+화1개Fe3+사겁쌍봉조성,병진행료단사성협석중적기변삼수포괄팔면체건각(σ2)화건장변량(△)적계산.단시,재량개기변삼수지간존재착명현적차이,장무법대타문적목사보이삼수화사겁쌍봉진행지파.본문대온도재동질이능위이화사겁분렬중적작용진행료탐토,근거통과목사보이효응화f(Fe3+(O))/f(Fe2+(O))적평균치획득적삼개철대전철적비치,개사료단사성협석적화학식.
Monoclinic astrophyllite from Kala Peninsula, Russia was investigated by 57Fe Mossbauer effect. The Mossbauer spectra of the sample at 298 K, 180 K and 80 K were measured. Each spectrum of monoclinic astrophyllite consists of two Fe2+ and one Fe3+ quadrupole doublets. The distortion parameters, the variances of the octahedral bond angles 0-2 and the normalized bond-length variation △ for monoclinic astrophyllite were calculated. However, since a discrepancy between two distortion parameters exists, an assignment of the quadrupole doublet to iron at the specific site was not given. Temperature dependences of the isomer shift and the quadrupole splitting were presented and discussed. According to the ratio of ferric to total iron obtained by the Mossbauer effect and the mean value off ( Fe3+ (O) )/f ( Fe2+ (O) ), the chemical formula of monoclinic astrophyllite was rewritten.