Institute of Multidisciplinary Research for Advanced Materials, Tohoku University


LAST UPDATE 2021/05/02

  • 研究者氏名
    Researcher Name

    山根久典 Hisanori YAMANE
    教授 Professor
  • 所属
    Professional Affiliation

    Institute of Multidisciplinary Research for Advanced Materials, Tohoku University

    無機材料研究部門 無機固体材料合成研究分野
    Division of Inorganic Material Research, Inorganic Crystal Structural Materials Chemistry
  • 研究キーワード
    Research Keywords

    Inorganic solid state chemistry
    Inorganic structural chemistry
    Synthesis of novel inorganic compounds and materials
    Crystal structure analysis of inorganic solid state compounds
Research Subject
Synthesis, structure analysis and characterization of new multinary inorganic compounds

研究の背景 Background


Wide fields of inorganic compounds consisting of various elements are still uncultivated, and multinary compounds having unknown crystal structures and properties may lie hidden. Development of new synthetic methods is important for the preparation of the new compounds. The knowledge obtained by the discovery of the new compounds is valuable heritage which will support material science in the next generation.

研究の目標 Outcome


New multinary inorganic compounds, such as ternary and quaternary oxides, nitrides, and Zintl compounds have been synthesized by a newly developed method using melts of active metals as well as by conventional synthetic methods. Their crystal structures have been clarified by X-ray diffraction, and their properties such as electrical and ionic conductions, photoluminescence, and thermoelectric power generation have been characterized.

研究図Research Figure

Fig.1. Crystal structures of MgBa4[Si2N6]. The compound consist of edge-sharing SiN4 tetrahedra of isolated nitridosilicate anions [Si2N6]10−. Mg2+ cations are planar- rectangularly coordinated by four nitrogen atoms.Fig.2. Crystal structure of Li2B3PO8. The sheets of ∞2[B3PO8]2− formed by the linkage of triangular BO3 and tetrahedral BO4 and PO4 groups stack along the b-axis direction.Fig.3. Projective view of the crystal structure of Li2NaBP2O8 along the a axis. One-dimensional ∞1[BP2O8]3− chains are formed in the direction of the c axis by linkage of the four-membered rings composed of two PO4 and two BO4 tetrahedra.

文献 / Publications

J. Alloys Compnd., 555 (2013) 320–324, Dalton Trans., 43 (2014) 14525–14528, J. Solid State Chem., 225 (2015) 65–71.