# Group 8 metallocenes as single-source precursors for the synthesis of light-element-stabilized FCC phases under extreme conditions

https://mdr.nims.go.jp/datasets/4c1f85d6-7b01-44af-b1ef-7217a2042d22

## File

- [Group 8 metallocenes as single-source precursors for the synthesis of light-element-stabilized FCC phases under extreme conditions.pdf](https://mdr.nims.go.jp/filesets/8629c46f-01ce-41ef-9b3f-9af22a7c93ce/download) ([Detail](https://mdr.nims.go.jp/filesets/8629c46f-01ce-41ef-9b3f-9af22a7c93ce.md))
- [STAM-2026-0096_data.zip](https://mdr.nims.go.jp/filesets/742c8387-80cc-44d7-b1fb-c40cb280e596/download) ([Detail](https://mdr.nims.go.jp/filesets/742c8387-80cc-44d7-b1fb-c40cb280e596.md))
- [Supporting Information.pdf](https://mdr.nims.go.jp/filesets/e10f22b8-f72f-473f-963f-4d5e9ebad86e/download) ([Detail](https://mdr.nims.go.jp/filesets/e10f22b8-f72f-473f-963f-4d5e9ebad86e.md))

## Id

4c1f85d6-7b01-44af-b1ef-7217a2042d22

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2026-06-24T01:44:39.130024Z

## Updated at

2026-06-24T02:49:59.624779Z

## Published at

2026-06-24T05:27:48.918297Z

## Doi

https://doi.org/10.48505/nims.6363

## First published url

https://doi.org/10.1080/14686996.2026.2688058

## Date published

2026-12-31

## Recorded date published

2026-12-31

## Resource type

journal_article

## Manuscript type

accepted_manuscript

## Collection



## Title

- title: Group 8 metallocenes as single-source precursors for the synthesis of light-element-stabilized
    FCC phases under extreme conditions
  title_type: original
  lang: en

## Description

- description: Metallocenes are promising single-source precursors for the synthesis
    of transition-metal carbides and hydrides due to their atomic-scale mixing of
    metal, carbon, and hydrogen. In this study, we investigated the high-pressure
    and high-temperature (HP–HT) behavior of group 8 metallocenes, ferrocene [Fe(C5H5)2]
    and ruthenocene [Ru(C5H5)2], at pressures up to 68 GPa using a laser-heated diamond
    anvil cell. Optical and Raman spectroscopic observations revealed that both complexes
    undergo a transition to an opaque state above ~20 GPa, enabling efficient laser
    coupling. In situ synchrotron X-ray diffraction measurements demonstrated that
    HP–HT treatment of ferrocene and ruthenocene above 30 GPa yielded the formation
    of the face-centered cubic phase, which indicates that the decomposition of metallocenes
    under extreme conditions facilitates the stabilization of exotic, light-element-incorporated
    metallic phases. Our findings highlight the potential of organometallic precursors
    in exploring the structural diversity of metal-light element systems under ultrahigh
    pressures.
  description_type: abstract
  lang: en

## Creator

- name: Ken Niwa
  role: author
  organization: Nagoya University
  department: a Research Center for Crystalline Materials Engineering, Faculty of
    Engineering
- name: Kenta Nakashima
  role: author
- name: Yusuke Kimura
  role: author
- name: Nico Alexander Gaida
  role: author
- name: Takuya Sasaki
  role: author
- name: Masashi Hasegawa
  role: author

## Contact agent



## Publisher

organization: Taylor & Francis
ror: https://ror.org/

## Managing organization



## Keyword

- subject: Metallocenes
  schema: not_defined
- subject: high pressure synthesis
  schema: not_defined
- subject: laser-heated diamond-anvil cell
  schema: not_defined
- subject: high pressure in situ measurement
  schema: not_defined

## Rights

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

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: Science and Technology of Advanced Materials
  issn: '14686996'
  volume: '27'
  issue: '1'
  article_number: '2688058'

## Conference



## Related item



## Funding



## 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: 8629c46f-01ce-41ef-9b3f-9af22a7c93ce
  filename: Group 8 metallocenes as single-source precursors for the synthesis of
    light-element-stabilized FCC phases under extreme conditions.pdf
  content_type: application/pdf
  size: 1596344
  md5: 5b26abddb2ff55f00fe40dd4fb1f2925
- id: 742c8387-80cc-44d7-b1fb-c40cb280e596
  filename: STAM-2026-0096_data.zip
  content_type: application/zip
  size: 859223
  md5: 370bb2c867841fe2df24222a47be8e50
- id: e10f22b8-f72f-473f-963f-4d5e9ebad86e
  filename: Supporting Information.pdf
  content_type: application/pdf
  size: 1015866
  md5: e978e487956e30a52c951a8bca55df76

## Thumbnail

fileset_id: 8629c46f-01ce-41ef-9b3f-9af22a7c93ce
filename: Group 8 metallocenes as single-source precursors for the synthesis of light-element-stabilized
  FCC phases under extreme conditions.pdf