Data for: Dating a Martian Meteorite with 20 Ma Precision Using a Prototype In-Situ Dating Instrument

These two excel data tables contain the reduced CODEX LARIMS data required to reproduce our Zagami isochron diagrams for February and September 2019 data acquisitions. Each excel file has a header explaining each column. Each spot measurement on Zagami is recorded as a row, with a filename to allow us to identify the original raw data if needed, the date acquired, the measurement position on the sample, the integrated peak areas, the 1-sigma standard error uncertainties, and correlation coefficients.