Publication
Reference
Isambert A., De T., Gloter A., Reynard B., Guyot F., Valet J.-P. (2006). Magnetite-like nanocrystals formed by laser-driven shocks in siderite. Earth Planet. Sci. Lett., 243, 820 - 827.
Names
  • A. Isambert
  • T. De
  • A. Gloter
  • B. Reynard
  • F. Guyot
  • J.-P. Valet
Article and keywords
Title
Magnetite-like nanocrystals formed by laser-driven shocks in siderite
Abstract
Laser-driven shock experiments were carried out on Mn and Mg-bearing natural crystalline siderite under vacuum. Raman spectroscopy and transmission electron microscopy were performed on samples recovered from shock pressures between 8.4GPa and 25.9GPa. Two different iron oxides were observed in the laser impact crater: hematite – already present in the starting sample – and a spinel-structured phase, both associated with iron carbonates. This nanometer-sized Mn-bearing magnetite-like phase results from shock-induced decarbonation of siderite. High-pressure shocks, such as meteorite impacts, are a plausible mechanism for generating nanocrystals of magnetite from Fe-carbonate-bearing terrestrial and extraterrestrial materials.
Keywords
nanometer-sized magnetite, Mn-rich siderite, martian meteorites, laser shocks
Content
sample
Year
2006
Journal
Earth and Planetary Science Letters
Volume
243
Number
3
Pages
820 - 827
Document type
article
Publication state
published
Doi
10.1016/j.epsl.2006.01.060
Identifiers
Experiment/Spectra