Related Experiment Video
Updated: Jul 12, 2026

In Situ SIMS and IR Spectroscopy of Well-defined Surfaces Prepared by Soft Landing of Mass-selected Ions
Published on: June 16, 2014
Photochemical mass-independent sulfur isotopes in achondritic meteorites
Vinai K Rai1, Teresa L Jackson, Mark H Thiemens
1Department of Chemistry and Biochemistry, University of California San Diego, La Jolla, CA 92093-0356, USA. rai@chem.ucsd.edu
Abstract:
Sulfides from four achondrite meteorite groups are enriched in 33S (up to 0.040 per mil) as compared with primitive chondrites and terrestrial standards. Stellar nucleosynthesis and cosmic ray spallation are ruled out as causes of the anomaly, but photochemical reactions in the early solar nebula could produce the isotopic composition. The large 33S excess present in oldhamite from the Norton County aubrite (0.161 per mil) suggests that refractory sulfide minerals condensed from a nebular gas with an enhanced carbon-oxygen ratio, but otherwise solar composition is the carrier. The presence of a mass-independent sulfur effect in meteorites argues for a similar process that could account for oxygen isotopic anomalies observed in refractory inclusions in primitive chondrites.
More Related Videos
14:53In Situ Detection and Single Cell Quantification of Metal Oxide Nanoparticles Using Nuclear Microprobe Analysis
Published on: February 3, 2018
10:41Enhanced Electron Injection and Exciton Confinement for Pure Blue Quantum-Dot Light-Emitting Diodes by Introducing Partially Oxidized Aluminum Cathode
Published on: May 31, 2018
Related Concept Videos
Precipitation and Co-precipitation
Inductively Coupled Plasma-Mass Spectrometry (ICP-MS): Interferences
Atomic Absorption Spectroscopy: Radiation and Light Sources
Two common narrow-range 'line' sources used in AAS are hollow-cathode lamps (HCLs) and...
Atomic Emission Spectroscopy: Overview
Atomic Emission Spectroscopy: Lab
Imperfections in Crystal Structure: Stoichiometric Point Defects