# Sr–Si diagram at Si contents of 55–100 at% and crystal structure of SrSi2-x

https://mdr.nims.go.jp/datasets/be9e388b-3f23-4a9e-af2e-5a3407348568

## File

- [Sr_Si_diagram_ver4_text_Figs.pdf](https://mdr.nims.go.jp/filesets/b2f62d50-8c33-4ee4-961d-71ac47b4b7aa/download) ([Detail](https://mdr.nims.go.jp/filesets/b2f62d50-8c33-4ee4-961d-71ac47b4b7aa.md))
- [SupplData_MDR.pdf](https://mdr.nims.go.jp/filesets/3e7331b6-1fb0-4ad8-b716-5fd6748a6369/download) ([Detail](https://mdr.nims.go.jp/filesets/3e7331b6-1fb0-4ad8-b716-5fd6748a6369.md))

## Id

be9e388b-3f23-4a9e-af2e-5a3407348568

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2025-09-02T00:47:33.643322Z

## Updated at

2025-09-11T23:30:25.971131Z

## Published at

2025-09-11T23:18:11.093523Z

## Doi

https://doi.org/10.48505/nims.5694

## First published url

https://doi.org/10.1016/j.jallcom.2023.172137

## Date published

2023-09-12

## Recorded date published

2023-12

## Resource type

journal_article

## Manuscript type

accepted_manuscript

## Collection



## Title

- title: Sr–Si diagram at Si contents of 55–100 at% and crystal structure of SrSi2-x
  title_type: original
  lang: en

## Description

- description: 'Cubic SrSi2 has attracted attention as a thermoelectric material or
    Weyl semimetal candidate material. However, its physical properties have not been
    examined in detail. High-quality samples are required for this purpose. A previous
    study on the Sr–Si phase diagram reported that cubic SrSi2 is a low-temperature
    phase and tetragonal SrSi2 is a high-temperature phase based on little experimental
    evidence, highlighting the difficulty in synthesizing high-quality cubic SrSi2
    samples. Therefore, a new investigation of the Sr–Si phase diagram is necessary.
    This study experimentally investigated the Sr–Si diagram at Si contents of 55–100
    at.% using arc-melted samples by performing inductively-coupled plasma optical
    emission spectroscopy, electron-probe microanalysis, powder X-ray diffraction
    analysis, and differential thermal analysis. Two intermetallic compounds (SrSi2-x
    and SrSi2) and two eutectic reactions existed in this Si content range. The eutectic
    points were approximately 57 at.% and 1053.2 °C for Liquid <=> SrSi + SrSi2-x
    and approximately 75 at.% and 1050.0 °C for Liquid <=> SrSi2 + Si. SrSi2 had no
    high-temperature phase and melted congruently at 1121 °C. SrSi2-x existed at Si
    contents of 62.4–65.0 at.%, and it is involved in peritectic. SrSi2-x crystallized
    into a monoclinic variant of the √5 × √5 × 1 α-ThSi2-type superstructure with
    ordered Si defects at the body-center position of the cell (space group: I121,
    No. 5). SrSi2-x is the first example of the α-ThSi2-type superstructure.'
  description_type: abstract
  lang: und

## Creator

- name: Motoharu Imai
  role: author
  orcid: https://orcid.org/0000-0002-5848-113X
  organization: National Institute for Materials Science
- name: Kwangsik Han
  role: author
  orcid: https://orcid.org/0000-0002-5701-5348
  organization: National Institute for Materials Science
- name: Mitsuaki Nishio
  role: author
  orcid: https://orcid.org/0000-0002-8177-3587
  organization: National Institute for Materials Science
- name: Takeshi Kato
  role: author
  orcid: https://orcid.org/0000-0002-3317-7481
  organization: National Institute for Materials Science
- name: Satoshi Kawada
  role: author
  orcid: https://orcid.org/0000-0003-4618-2746
  organization: National Institute for Materials Science
- name: Satoshi Emura
  role: author
  orcid: https://orcid.org/0000-0001-5789-6408
  organization: National Institute for Materials Science
- name: Taichi Abe
  role: author
  orcid: https://orcid.org/0000-0002-5065-0939
  organization: National Institute for Materials Science
- name: Hiroshi Fujihisa
  role: author

## Contact agent



## Publisher

organization: Elsevier BV

## Managing organization



## Keyword

- subject: silicide
  schema: not_defined
- subject: phase diagram
  schema: not_defined
- subject: thermal analysis
  schema: not_defined
- subject: crystal structure
  schema: not_defined

## Rights

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

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo

start_date: 2023-09-12
end_date: 2025-09-12

## Journal

- title: Journal of Alloys and Compounds
  issn: '09258388'
  volume: '968'
  article_number: '172137'

## Conference



## Related item



## Funding

- identifier: JP22H00268
  funder_name: JSPS
- identifier: 0341201-A
  funder_name: Iketani Science and Technology Foundation

## Instrument



## Instrument operator



## Instrument managing organization



## Measurement method



## Specimen



## Chemical composition



## Structure for specimen



## Structural feature for specimen



## Specific property for specimen



## Process for specimen treatment



## Computational method



## Energy level/transition state



## Software



## Custom property



## Fileset

- id: b2f62d50-8c33-4ee4-961d-71ac47b4b7aa
  filename: Sr_Si_diagram_ver4_text_Figs.pdf
  content_type: application/pdf
  size: 2849082
  md5: 280e0eb21be68cdbd4cbcb1444bf9e70
- id: 3e7331b6-1fb0-4ad8-b716-5fd6748a6369
  filename: SupplData_MDR.pdf
  content_type: application/pdf
  size: 751247
  md5: '0807d04e02b306f12552e1922999cc84'

## Thumbnail

fileset_id: b2f62d50-8c33-4ee4-961d-71ac47b4b7aa
filename: Sr_Si_diagram_ver4_text_Figs.pdf