Modulation in Co-akermanite.

スポンサーリンク

概要

• 論文の詳細を見る

• Diffraction patterns of synthetic Co-åkermanite, Ca2CoSi2O7, reveal distinct satellite reflections at room temperature. An incommensurate modulation in this material has been determined by five-dimensional refinement of the structure. The basic structure is tetragonal P421m, unit-cell dimensions a=7.8417(6), c=5.0249(3)Å, V=308.99Å3, Z=2, M=307.26, Dx=3.302g•cm-3, MoKα with graphite monochromator, μ=47.7cm-1, F(000)=302, R=0.049 for 734 unique reflections. The modulated structure is also tetragonal Pp421mp4mg, k1=0.2913×(a*+b*), k2=0.2913×(-a*+b*), where k1, k2 wave vectors and a*, b* reciprocal lattice vectors of the basic structure, R=0.098 for 3915 unique reflections. The modulation is caused by the shifts of the constituent atoms.

• 日本学士院の論文

著者

• HAGIYA Kenji

  Department of Life Science, Himeji Institute of Technology

• Iishi Kazuaki

  Department Of Mineralogical Science And Geology Yamaguchi University

• Ohmasa Masaaki

  Department Of Life Science Himeji Institute Of Technology

関連論文

• Modulated structures in melilites
• On variety of the Ca coordination in the incommensurate structure of synthetic iron-bearing akermanite, Ca_2(Mg_,Fe_)Si_2O_7
• Modulation in Co-akermanite.

スポンサーリンク