Nihon Kessho Gakkaishi

Diffuse Scattering and Low-energy Excitations of Superionic Conductors

Takashi SAKUMA

1995 Volume 37 Issue 4 Pages 199-205
Published: August 30, 1995
Released on J-STAGE: September 30, 2010

DOIhttps://doi.org/10.5940/jcrsj.37.199

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An attempt has been made in this review to cover recent information on the structure of supersonic conductors investigated by the diffuse scattering measurement. The presence of low-energy excitations in crystalline superionic conductors and the superionic conducting glass is investigated by neutron inelastic scattering measurements. The relation between the excitation energy and the mass of the cations is discussed.

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The Interstratified Structure in Phyllosilicate Minerals—with Special Reference to Interstratified Clay Minerals—

Takashi WATANABE

1995 Volume 37 Issue 4 Pages 206-214
Published: August 30, 1995
Released on J-STAGE: September 30, 2010

DOIhttps://doi.org/10.5940/jcrsj.37.206

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In phyllosilicate minerals, specially in fine-grained clay minerals, it is well known that interstratification is formed among two or more kinds of clay minerals being elementary component layers. The interstratification can be described by using the statistical theory and analysed with the XPD theory concerning one-dimensionally disordered crystals. Recently, the interpretation of the interstratified structure of clay minerals has attracted special interest in crystallographical and geochemical fields. This text gives an interpretation to the Interstratified structure and points at geochemical interest focusing to the crystallochemical problem of interstratified clay minerals.

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Topology and Construction Principle of Zeolite Frameworks

Mitsuo SATO

1995 Volume 37 Issue 4 Pages 215-223
Published: August 30, 1995
Released on J-STAGE: September 30, 2010

DOIhttps://doi.org/10.5940/jcrsj.37.215

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Topological characteristics of zeolite frameworks has been reviewed on the basis of concentric cluster (CCL) and Hamiltonian graph representations. The framework characteristics has been confirmed to be faithfully realized on these graphs, and their topological similarity on the differentiation process of the CCL. The construction principle of the CCL also has been reviewed along with the toplogical and stereochemical compatibility of kernel and periphiral CCLs. The SBU, TBU and SSU criteria already proposed are realized on the construction process of the CCL. A possibility is suggested that the diversity of zeolite frameworks can be interpreted in terms of the local topology and geometry of 2nd CCLs only.

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Application of Isoscattering Point to Analysis of Solute Structures

Takeshi KAWAGUCHI

1995 Volume 37 Issue 4 Pages 224-227
Published: August 30, 1995
Released on J-STAGE: September 30, 2010

DOIhttps://doi.org/10.5940/jcrsj.37.224

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Isoscattering point is the specific point at which X-ray or neutron scattering intensity of solutes is independent of contrast between solutes and solvent. The point has been observed in the X-ray small-angle scattering curves of globular particles such as micelles and bacteriophages. The condition for appearance of the Isoscattering point is briefly summarized and in view of the application to analysis of the solute structures, the nature of the isoscattering point is described in detail.

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[title in Japanese]

[in Japanese], [in Japanese], [in Japanese], [in Japanese]

1995 Volume 37 Issue 4 Pages 228-229
Published: August 30, 1995
Released on J-STAGE: September 30, 2010

DOIhttps://doi.org/10.5940/jcrsj.37.228

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