Abstracts for Annual Meeting of Japan Association of Mineralogical Sciences
2015 Annual Meeting of Japan Association of Mineralogical Sciences
Showing 101-150 articles out of 208 articles from the selected issue
R2: Crystal structure, crystal chemistry, physical properties of minerals, crystal growth and applied mineralogy
  • Hirotsugu Nishido, Nobuhiro Kusano, Syuhei Ohgo, Sota Noumi
    Session ID: R2-P18
    Published: 2015
    Released: January 15, 2020
    CONFERENCE PROCEEDINGS FREE ACCESS
    Benstonite (Ba6Ca6Mg(CO3)13) shows a characteristic cathodoluminescence (CL) in a red region,  which can be assigned to an impurity center of divalent Mn ion. The wavelength of an emission band centered at 627 nm is slightly longer than those of emission bands in calcite and dolomite, suggesting its strong crystal-field (Dq) around Mn ion comparing with calcite and dolomite.
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  • Isao Sakaguchi, Ken Watanabe, Noriko Saito, Yutaka Adachi, Taku Suzuki
    Session ID: R2-P19
    Published: 2015
    Released: January 15, 2020
    CONFERENCE PROCEEDINGS FREE ACCESS
    Zincite thin films were grown on Al2O3 substrate by pulsed laser deposition method. After the characterization, gas sensor properties were evaluated. In this paper, we discuss the relationship film character and sensor response. 
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  • Tomoaki Matsui, Giulio Lampronti, Iris Buisman, Simon Redfern
    Session ID: R2-P20
    Published: 2015
    Released: January 15, 2020
    CONFERENCE PROCEEDINGS FREE ACCESS
    In the Hakone district, there are two types of anorthite megacryst which are coloured yellow and colourless. Preliminary analysis by XPS had shown that iron in the yellow megacryst was ferric. Crystal structures of the above yellow and colourless anorthite megacrysts were refined from single crystal
    diffraction data in space group P-1 and I-1 respectively. Average T-O bond distances for both megacrysts suggested that Al/Si distributions in the T-site were highly ordered. In particular, the T1(0z00)-site in the
    yellow sample, the T-O bond distance was slightly longer and the isotropic temperature factor was just smaller than the other Al-sites. Judging from the compositional data (EPMA) and the structural evidence (XRD) it seems reasonable for ferric iron to enter T-site in the yellow one, and for ferrous iron into
    the M-site of the colourless sample. These results imply that a somewhat large and heavy cation occupies the T1(0z00)-site, namely, partial replacement of Al3+ by Fe3+. Thus, the colouration in the yellow anorthite megacryst was confirmed structurally.
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R3: High-pressure science and deep Earth's material
R4: Mineral sciences of the Earth surface
R5: Extraterrestrial materials
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