6533b825fe1ef96bd1282068
RESEARCH PRODUCT
Quantitative Raman spectroscopy as a tool to study the kinetics and formation mechanism of carbonates
Mercedes CáceresDavid Fernández-remolarLaura J. BonalesLaura J. BonalesOlga Prieto-ballesterosDavid Santamaría-pérezDavid Santamaría-pérezVictoria Muñoz-iglesiasVictoria Muñoz-iglesiassubject
CalciteReaction mechanismChemistryPrecipitation (chemistry)KineticsAnalytical chemistrySpectrum Analysis RamanAtomic and Molecular Physics and OpticsCalcium CarbonateAnalytical ChemistryKineticssymbols.namesakechemistry.chemical_compoundX-Ray DiffractionChondriteX-ray crystallographysymbolsChemical PrecipitationMagnesiumRaman spectroscopyInstrumentationSpectroscopydescription
We have carried out a systematic study of abiotic precipitation at different temperatures of several Mg and Ca carbonates (calcite, nesquehonite, hydrocalcite) present in carbonaceous chondrites. This study highlights the capability of Raman spectroscopy as a primary tool for performing full mineralogical analysis. The precipitation reaction and the structure of the resulting carbonates were monitored and identified with Raman spectroscopy. Raman spectroscopy enabled us to confirm that the precipitation reaction is very fast (minutes) when Ca(II) is present in the solution, whereas for Mg(II) such reactions developed at rather slow rates (weeks). We also observed that both the composition and the reaction mechanisms depended on temperature, which might help to clarify several issues in the fields of planetology and geology, because of the environmental implications of these carbonates on both terrestrial and extraterrestrial objects.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2013-04-22 | Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy |