| Title: |
Identification of a Fe II -Fe III hydroxyphosphate formed by anionic exchange of a hydroxychloride green rust precursor |
| Authors: |
Sdiri, W.; Coustel, R.; Ounacer, M.; Cornu, D.; Nelson, A.; Ona-Nguema, G.; Despas, C.; Mallet, M.; André, E.; Truong, C.; Nitschke, W.; Duval, S.; Abdelmoula, M.; Bergaoui, Latifa; Ruby, C. |
| Contributors: |
Laboratoire de Chimie Physique et Microbiologie pour les Matériaux et l'Environnement (LCPME); Institut de Chimie - CNRS Chimie (INC-CNRS)-Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS); Institut National des Sciences Appliquées et de Technologie Tunis (INSAT); Université de Carthage (Tunisie) = University of Carthage (UCAR); Institut de minéralogie, de physique des matériaux et de cosmochimie (IMPMC); Muséum national d'Histoire naturelle (MNHN)-Institut de recherche pour le développement IRD : UR206-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS); Bioénergétique et Ingénierie des Protéines (BIP); Aix Marseille Université (AMU)-Centre National de la Recherche Scientifique (CNRS); ANR-22-CE30-0035,deltaG2Life,Une emergence de la vie en accord avec la thermodynamic; (2022) |
| Source: |
ISSN: 2468-0230 ; Surfaces and Interfaces ; https://hal.science/hal-05470786 ; Surfaces and Interfaces, 2026, 83, pp.108518. ⟨10.1016/j.surfin.2026.108518⟩. |
| Publisher Information: |
CCSD; Elsevier |
| Publication Year: |
2026 |
| Collection: |
Université de Lorraine: HAL |
| Subject Terms: |
Anionic exchange; Green rust; Hydroxyphosphate; Layered double hydroxide; Mössbauer spectroscopy; [SDU.STU.MI]Sciences of the Universe [physics]/Earth Sciences/Mineralogy; [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry |
| Description: |
International audience ; Hydroxyphosphate green rust (GRPO 4 ) is a Fe II -Fe III lamellar mineral with phosphate ions in the interlamellar space. This compound was recently hypothesized to have played a role in the emergence of life through the condensation and transport of phosphate, coupled to charge and proton transfer. However, the conditions under which this mineral is formed are still unknown. A stabilized form of chloride GR (GRCl) was put in contact with increasing amounts of phosphate (nP) to investigate the formation of GRPO 4 through anionic exchange. A small initial shift in the interlamellar distance of the GRCl was observed corroborating DFT results which predict an increase in interlamellar distance. In addition, at higher nP/nFe values, new small angles XRD diffraction peaks were detected, the most intense of those was attributed to the formation of GRPO 4 . XRD as well as Raman and Mössbauer spectroscopies suggest the formation of an extra phase along with GRPO 4 , most probably a Fe II -Fe III phosphate. In parallel, ion chromatography indicates the full release in solution of the chloride anions. The final concentration of phosphate measured in solution represents only ~75 % of the expected values for GRPO 4 , which supports the formation of the iron phosphate. In conclusion, the reactivity of GRCl with phosphate occurred at least in 3 steps: (i) adsorption of PO 4 on the GRCl surface, (ii) anionic exchange of Cl -by PO 4 species leading to the formation of GRPO 4 (iii) precipitation of an extra iron phosphate phase sequestering significantly higher amount of PO 4 compared to green rust. |
| Document Type: |
article in journal/newspaper |
| Language: |
English |
| DOI: |
10.1016/j.surfin.2026.108518 |
| Availability: |
https://hal.science/hal-05470786; https://hal.science/hal-05470786v1/document; https://hal.science/hal-05470786v1/file/version%20auteur.pdf; https://doi.org/10.1016/j.surfin.2026.108518 |
| Rights: |
https://about.hal.science/hal-authorisation-v1/ ; info:eu-repo/semantics/OpenAccess |
| Accession Number: |
edsbas.BFC70B1 |
| Database: |
BASE |