Astromat

This dataset contains Atomic Force Microscopy (AFM) measurements of particle cohesion for three carbonaceous chondrite meteorites: Aguas Zarcas, Tagish Lake, and Tarda. These meteorites were selected as terrestrial analog materials for comparison with samples returned from asteroid (101955) Bennu, using the same AFM-based measurement technique. The dataset includes raw force–distance curves stored as .txt files, with four columns corresponding to the extend and retract measurements. An accompanying adhesion.txt file provides the measured cohesion (adhesion) force values for each dataset. Individual meteorite particles (e.g., P1, P2) were measured at multiple locations or spots (e.g., Spot 1, Spot 2) to characterize spatial variability in particle cohesion. For each meteorite, measurements were conducted using two different AFM cantilever tips composed of the same material. The raw AFM data require correction and conversion using the cantilever spring constant (K) and deflection sensitivity associated with each tip. These calibration parameters are provided in the supplementary files for each meteorite, together with the complete set of cohesion force measurements expressed in nanonewtons (nN), organized by meteorite, AFM tip, particle, and measurement spot. Together, these data provide a detailed record of particle-scale cohesion measurements for three carbonaceous chondrites and enable direct comparison with analogous AFM measurements obtained from returned material from asteroid (101955) Bennu. The dataset can support investigations of the mechanical and surface properties of carbonaceous asteroid materials and improve our understanding of the role of particle cohesion in the physical behavior and evolution of primitive small bodies.