Journal Article

PUBDB-2024-08073

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Synthesis, structural and spectroscopic characterization of defect-rich forsterite as a representative phase of Martian regolith

Jundullah Hanafi, M. I. ; Bastonero, L. ; Murshed, M. M. (Corresponding author) ; Robben, L.Extern* ; Dononelli, W. ; Kirsch, A.Extern* ; Marzari, N. ; Gesing, T. M.Extern*

2024
[Verlag nicht ermittelbar] Chester

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Please use a persistent id in citations: doi:10.1107/S2052252524009722  doi:10.3204/PUBDB-2024-08073

Abstract: Regolith draws intensive research attention because of its importance as the basis for fabricating materials for future human space exploration. Martian regolith is predicted to consist of defect-rich crystal structures due to long-term space weathering. The present report focuses on the structural differences between defect-rich and defect-poor forsterite (Mg2SiO4) – one of the major phases in Martian regolith. In this work, forsterites were synthesized using reverse strike co-precipitation and high-energy ball milling (BM). Subsequent post-processing was also carried out using BM to enhance the defects. The crystal structures of the samples were characterized by X-ray powder diffraction and total scattering using Cu and synchrotron radiation followed by Rietveld refinement and pair distribution function (PDF) analysis, respectively. The structural models were deduced by density functional theory assisted PDF refinements, describing both long-range and short-range order caused by defects. The Raman spectral features of the synthetic forsterites complement the ab initio simulation for an in-depth understanding of the associated structural defects.Keywords: Martian forsterite; crystal structures; defects; DFT–PDF; Raman spectroscopy; X-ray powder diffraction; ball milling.

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Contributing Institute(s):

1. DOOR-User (DOOR ; HAS-User)

Research Program(s):

1. 6G3 - PETRA III (DESY) (POF4-6G3) (POF4-6G3)
2. DFG project G:(GEPRIS)429360100 - Studien an in-situ Daten der totalen Streufunktion: Bildungsmechanismen von ternären multiferroischen Bismutferraten (429360100) (429360100)
3. DFG project G:(GEPRIS)390741603 - EXC 2077: Der Ozeanboden – unerforschte Schnittstelle der Erde (390741603) (390741603)

Experiment(s):

1. PETRA Beamline P02.1 (PETRA III)

Appears in the scientific report 2024

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