# Quantum beam diffraction measurement and topological analysis of tetrahedrally coordinated non-crystalline materials

https://mdr.nims.go.jp/datasets/2081771d-3841-4b14-9285-1a747bd3b01e

## File

- [134_25125.pdf](https://mdr.nims.go.jp/filesets/7178fd03-50a8-4153-ba6b-44afc2c2ec9c/download) ([Detail](https://mdr.nims.go.jp/filesets/7178fd03-50a8-4153-ba6b-44afc2c2ec9c.md))

## Id

2081771d-3841-4b14-9285-1a747bd3b01e

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2026-04-02T03:20:26.999329Z

## Updated at

2026-04-03T00:47:21.483308Z

## Published at

2026-04-03T03:26:39.817114Z

## Doi



## First published url

https://doi.org/10.2109/jcersj2.25125

## Date published

2026-04-01

## Recorded date published

2026

## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Quantum beam diffraction measurement and topological analysis of tetrahedrally
    coordinated non-crystalline materials
  title_type: original
  lang: en

## Description

- description: The construction of large quantum beam facilities such as the synchrotron
    radiation facility SPring-8 and the high-intensity proton accelerator facility
    J-PARC has provided access to high-intensity, high-energy quantum beams that are
    essential for structural analyses of noncrystalline materials via diffraction
    measurements in Japan. The developments of quantum beam diffraction techniques
    led to significant advancements in the research field. By the complementary use
    of X-rays, which are sensitive to heavy elements, and neutrons, which are sensitive
    to light elements, along with the advances in computer simulations and topological
    analysis techniques, we have achieved a deep understanding of disordered structures
    with intermediate-range ordering. In this article, we review the recent results
    obtained by the complementary use of quantum beam diffraction and topological
    analyses of silica polymorphs, covering silica crystals and densified silica glasses.
    The comparison between the persistent homology analysis data and the ring size
    distribution has led to the classification of a series of densified silica glasses
    and crystals in terms of ring persistency (ring shape) and ring entropy (topological
    order–disorder). This is a new concept to understand the nature of order–disorder
    observed in a series of silica polymorphs without using diffraction data. We also
    discuss the difference among disordered materials, which comprises an AA4 (A=Si)
    tetrahedral network (amorphous silicon), an AX4 (A=Si, X=O) tetrahedral network
    (glassy silica), and a non-tetrahedral network due to isolated AX4 (A=C, X=Cl)
    tetrahedra (liquid carbon tetrachloride) in terms of the origin of a three-peak
    structure, FSDP (Q1), PP (Q2), and Q3.
  description_type: abstract
  lang: und

## Creator

- name: Shinji Kohara
  role: author
  orcid: https://orcid.org/0000-0001-9596-2680
  organization: National Institute for Materials Science
- name: Koji Kimura
  role: author
- name: Motoki Shiga
  role: author
  orcid: https://orcid.org/0000-0003-2434-4716
  organization: National Institute for Materials Science
- name: Yohei Onodera
  role: author
  orcid: https://orcid.org/0000-0002-3080-6991
  organization: National Institute for Materials Science
- name: Akihiko Hirata
  role: author
- name: Koichi Hayashi
  role: author

## Contact agent



## Publisher

organization: Ceramic Society of Japan

## Managing organization



## Keyword

- subject: Non-crystalline materials
  schema: not_defined
- subject: Structure
  schema: not_defined
- subject: X-ray diffraction
  schema: not_defined
- subject: Neutron diffraction
  schema: not_defined
- subject: Topology
  schema: not_defined

## Rights

- identifier: https://creativecommons.org/licenses/by/4.0/

## Other identifier(s)



## Data origin



## Embargo



## Journal

- title: Journal of the Ceramic Society of Japan
  issn: '13486535'
  volume: '134'
  issue: '4'
  start_page: 208
  end_page: 216
  article_number: '25125'

## Conference



## Related item



## Funding

- identifier: 20H05878, 20H05881, and 20H05884
  funder_name: JSPS
  description: Grants-in-Aid for Transformative Research Areas (A) “Hyper-Ordered
    Structures Science”

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## Fileset

- id: 7178fd03-50a8-4153-ba6b-44afc2c2ec9c
  filename: 134_25125.pdf
  content_type: application/pdf
  size: 2167179
  md5: 94f7f84052b02943776be1c88a2c893d

## Thumbnail

fileset_id: 7178fd03-50a8-4153-ba6b-44afc2c2ec9c
filename: 134_25125.pdf