학술논문
Study on cation distributions and structural changes in Fe3+-Ga-bearing melilite using neutron and X-ray diffraction and Mössbauer spectral analyses / 中性子・Ｘ線回折法およびメスバウアー分光法によるFe3+-Ga-メリライトのイオン置換と結晶構造変化の解明
Document Type
Journal Article
Author
Source
Abstracts for Annual Meeting of Japan Association of Mineralogical Sciences. 2015, :78
Subject
Language
Japanese
Abstract
To reveal the distribution of Fe3+ between two tetrahedral site in melilite and the relationship between ionic substitution and incommensurate structure, two Fe-Ga-melilite samples were synthesized. The result of Rietveld refinement using X-ray and neutron diffraction data and Mössbauer spectroscopy revealed that Fe3+ distribution between T1 and T2 sites but Fe3+ prefers T1 sites. Mössbauer spectroscopic method, has a sensitive reaction for behavior of Fe, also indicates Fe3+ prefers larger T1 site. Doublets, given by Mössbauer spectroscopy indicate the existence of multiple T1 and T2 sites. This result indicates the incommensurate structure in melilite. Therefore, ionic substitution between T1 and T2 sites give rise to incommensurate structure.