Data · dataset · 2025
Raman data of FePO4
Listed in ScienceDB
Given the topological isomorphism between α-FePO4 and α-quartz, this study employed a diamond anvil cell coupled with Raman spectroscopy to examine the phase transition kinetics of α-FePO4.
Description
The structural evolution across a pressure range of 0.20-27.35 GPa was delineated into three stages: (1) At 2.80-3.65 GPa, α-FePO4 initiates a phase transition, achieving a complete transformation to FePO4-II at 4.60 GPa.
(2) Between 4.60-27.35 GPa, the (meta)stability of FePO4-II is predicated on the cooperative deformation of the adaptable [FeO6] octahedra and the rigid [PO4] tetrahedra. The progressive increase in structural disorder and the slowing of vibrational frequency shifts signify a transition to a non-linear compression regime. Notably, in the 9.80-11.10 GPa threshold, discontinuous variations in P-O bond lengths and mode widths serve as evidences of pressure-induced heterogeneous strain within the [FeO6]-[PO4] network, suggesting entry into a metastable region.
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(3) Upon decompression to 4.65 GPa, FePO4-II exhibits partial recovery of structural order, maintaining metastability at ambient conditions, which underscores its unique pressure memory characteristics. This study demarcates the stability boundary of α-FePO4, elucidates the fundamental mechanisms underpinning stability in orthophosphates, and forecasts structural evolution pathways. The findings offer insights into high-pressure dynamic response of quartz-like minerals.
Links
Where it is published
- DOI doi.org/10.57760/sciencedb.25732 ↗
DOI / persistent id · from scidb cn
Catalogue records · 1
- OAI-PMH record scidb.cn/oai?verb=GetRecord&metadataPrefix=oai_dc&identifier=10.57760%2… ↗
metadata API · from scidb cn
Topics
- From keywords
- Chemistry · Earth & Environmental Science · Engineering · Humanities · Life Sciences · Social Science
- Inferred from text
- Macromolecular and materials chemistry 72%
Provenance · 1 source records, 11 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| ScienceDB | 10.57760/sciencedb.25732 | 12 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| concepts[field].anzsrc:group:3403 | enrichment · scidb cn | taxonomy-embedding@1.0.0 | title+keywords+description (72%) |
| concepts[field].local:field:chemistry | mapping · scidb cn | connector:scidb_cn@1.0.0 | |
| concepts[field].local:field:earth-environmental | mapping · scidb cn | connector:scidb_cn@1.0.0 | |
| concepts[field].local:field:engineering | mapping · scidb cn | connector:scidb_cn@1.0.0 | |
| concepts[field].local:field:humanities | mapping · scidb cn | connector:scidb_cn@1.0.0 | |
| concepts[field].local:field:life-sciences | mapping · scidb cn | connector:scidb_cn@1.0.0 | |
| concepts[field].local:field:social-science | mapping · scidb cn | connector:scidb_cn@1.0.0 | |
| description | source · scidb cn | connector:scidb_cn@1.0.0 | /metadata/dc/description |
| license_text | source · scidb cn | connector:scidb_cn@1.0.0 | |
| publication_date | source · scidb cn | connector:scidb_cn@1.0.0 | |
| title | source · scidb cn | connector:scidb_cn@1.0.0 | /metadata/dc/title |