Astromat

Version 2 includes updates to Table 6. The dataset includes numbers of atoms of 132Xe and isotope ratios of the other xenon isotopes to 132Xe for each of a series of laser step heating analyses of sample OREX-803064-0. OREX-803064-0 is a single particle separated from aggregate sample OREX-803021-0. Xenon was released from the sample and admitted into the RELAX (Refrigerator Enhanced Laser Analyser for Xenon) time-of-flight, resonance ionization mass spectrometer at the University of Manchester for xenon isotopic analysis. 111 distinct, sequentially increasing temperature steps were analysed and calibrated with reference to air aliquots and blanks. Temperature was increased by increasing the power delivered to the sample by a fiber laser. The purpose of this dataset is to investigate the I-Xe system, and therefore the sample was artificially neutron irradiated prior to analysis (irradiation MN2025a). Aliquots of Shallowater enstatite were irradiated and analysed alongside the sample, to monitor the conversion of 127I to 128Xe; those data are also incorporated in this dataset. The Xe isotopic composition is similar to average carbonaceous chondrite (AVCC) xenon, with excesses of 129Xe from decay of 129I and 128Xe produced in the reactor. An I-Xe age ~15 Myr after CAI formation is determined, which may record a late halogen mobilising episode.

Version 2 includes updates to Table 6. The dataset includes numbers of atoms of 132Xe and isotope ratios of the other xenon isotopes to 132Xe for each of a series of laser step heating analyses of sample OREX-803063-0. OREX-803063-0 is a single particle separated from aggregate sample OREX-803021-0. Xenon was released from the sample and admitted into the RELAX (Refrigerator Enhanced Laser Analyser for Xenon) time-of-flight, resonance ionization mass spectrometer at the University of Manchester for xenon isotopic analysis. 109 distinct, sequentially increasing temperature steps were analysed and calibrated with reference to air aliquots and blanks. Temperature was increased by increasing the power delivered to the sample by a fiber laser. The purpose of this dataset is to investigate the I-Xe system, and therefore the sample was artificially neutron irradiated prior to analysis (irradiation MN2025a). Aliquots of Shallowater enstatite were irradiated and analysed alongside the sample, to monitor the conversion of 127I to 128Xe; those data are also incorporated in this dataset. In spite of the small mass of OREX-803063-0 (~2.5 ug recovered after irradiation), multiple heating steps were conducted to try to identify any variations in isotopic signature with temperature. A few heating steps have high 129Xe/132Xe ratios, but it is difficult to discern any other variations. The bulk 129Xe/132Xe ratio is ~1.07, high relative to Q-Xe.

Version 2 includes updates to Table 6. The dataset includes numbers of atoms of 132Xe and isotope ratios of the other xenon isotopes to 132Xe for each of a series of laser step heating analyses of sample OREX-803063-0. OREX-803063-0 is a single particle separated from aggregate sample OREX-803021-0. Xenon was released from the sample and admitted into the RELAX (Refrigerator Enhanced Laser Analyser for Xenon) time-of-flight, resonance ionization mass spectrometer at the University of Manchester for xenon isotopic analysis. 109 distinct, sequentially increasing temperature steps were analysed and calibrated with reference to air aliquots and blanks. Temperature was increased by increasing the power delivered to the sample by a fiber laser. The purpose of this dataset is to investigate the I-Xe system, and therefore the sample was artificially neutron irradiated prior to analysis (irradiation MN2025a). Aliquots of Shallowater enstatite were irradiated and analysed alongside the sample, to monitor the conversion of 127I to 128Xe; those data are also incorporated in this dataset. In spite of the small mass of OREX-803063-0 (~2.5 ug recovered after irradiation), multiple heating steps were conducted to try to identify any variations in isotopic signature with temperature. A few heating steps have high 129Xe/132Xe ratios, but it is difficult to discern any other variations. The bulk 129Xe/132Xe ratio is ~1.07, high relative to Q-Xe.

This dataset includes SIMS Pb–Pb and U–Pb isotope data for impact melt and phosphate in Apollo sample 67975, together with EPMA data for the mineral phases and the results of mineral-contribution modeling. All data were acquired at UCLA SIMS Facility and Rice University EPMA Lab.

This online dataset consists the analysis results of the ungrouped iron Löpönvaara (Related Publication #1). Complete analytical results are given in two separate spreadsheet files, one for each method used; standardised field-emission scanning electron microscope results (Tables 1−4 in Loponvaara_iron_SEM); and laser ablation single collector inductively coupled plasma mass spectrometry (Tables 5−6 in Loponvaara_iron_LA-ICPMS).

This online dataset consists of the analysis results of the ungrouped pallasite Lieksa (Related Publication #1). Complete analytical results are given three separate spreadsheet files, one for each method used: electron microprobe analysis (Tables 1−6 in Lieksa_pallasite_EPMA); standardised scanning electron microscope results (Table 7 in Lieksa_pallasite_SEM); and oxygen isotope results of Lieksa olivine obtained by secondary ion mass spectrometry (Table 8 in Lieksa_pallasite_SIMS).

Data collected in a study of the lunar regolith in Apollo 17 double drive tube 73001/2, which sampled a landslide deposit at the base of South Massif. Identification of mineral, rock, and glass fragments in polished grain mounts of >250 µm size fractions. Abundances of types of particles and mineral compositions are reported. Data were collected with a scanning electron microscope equipped for backscattered electron imaging and quantitative energy dispersive analysis, and by electron microprobe. All data were collected at the University of New Mexico.

Collection of Bennu 40Ar/39Ar analytical datasets.

Collection of Bennu petrographic and SEM datasets.

This includes two presentations from the Astromat Workshop at MetSoc 2026. The workshop aims to help researchers navigate the landscape of astromaterials sample data, from finding and accessing lab analytical data, to generating Open Science Data Management Plans (OSDMPs) for funding proposals, to documenting their own lab analytical data following community best practices, to depositing and archiving data in compliance with funders’ and journals’ policies. We specifically aim at early-career researchers to help them develop skills in digital cosmochemistry and make them aware of the resources available to support their data management. The workshop is organized by the Astromaterials Data System (Astromat), NASA’s designated archive for laboratory analytical data of returned samples.

Collection of 40Ar/39Ar geochronology and thermochronology datasets. The data were collected at the Western Australia Argon Isotope Facility, John de Laeter Centre, Curtin University, Western Australia.

This submission contains (for each of the five samples analysed) the SXRF scans (images) that show the distribution of the apatite grains measured, SXRF scans that show the position of the point measurements performed, and the quantified REE concentrations of each of the apatite grains (both the absolute concentrations and the CI-normalised concentrations).

Atom probe tomography reconstructed data from APT specimen OREX-803469-108, analysed in laser-assisted mode. All valid APT data is included, using an extended (Epos) data format that allows generation of alternative spatial reconstructions if required. This data set contains a moderate amount of 69Ga contamination near the specimen surface, and approximately 100 nm into the reconstruction on one side, due to ion implantation during specimen preparation with a monoisotopic 69Ga+ focussed ion beam. The data indicates a combination of pentlandite and pyrrhotite mineral phases. The pentlandite mineral contains several one-dimensional features enriched in Na and OH2. The reconstruction was performed using the voltage to model the specimen radius. A mass range definition file is included with all identified mass peaks.

Atom probe tomography reconstructed data from APT specimen OREX-803469-100, analysed in laser-assisted mode. All valid APT data is included, using an extended (Epos) data format that allows generation of alternative spatial reconstructions if required. This data set contains a small amount of 69Ga contamination near the specimen surface due to ion implantation during specimen preparation with a monoisotopic 69Ga+ focussed ion beam. The data indicates a homogenous pyrrhotite mineral phase. A mass range definition file is included with all identified mass peaks.

Atom probe tomography reconstructed data from APT specimen OREX-803469-101, analysed in laser-assisted mode. All valid APT data is included, using an extended (Epos) data format that allows generation of alternative spatial reconstructions if required. This data set contains a small amount of 69Ga contamination near the specimen surface due to ion implantation during specimen preparation with a monoisotopic 69Ga+ focussed ion beam. The data indicates a homogenous pyrrhotite mineral phase containing fluid inclusions. A mass range definition file is included with all identified mass peaks.