3D porosity structure of the earliest solar system material
We imaged a 50 mg chip of CM Murchison (from sample USNM 5487 on loan from the Smithsonian). XCT scans were done at the University of Texas High-Resolution X-ray Computed Tomography Facility (UTCT) on a Zeiss Versa 620 XRM at 90 kV and 12 W with the 0.
We next rescaled the Air scan volume so non-porous phases had a similar CT value to that of the Xe scan. To identify and measure the closed porosity, we made a pore map from the Air scan data (converted to 8bit) using Blob3D35 to segment out pores that were a minimum of 3 voxels large and had a CT value of 65 or less.
We next scaled the CT data volume, which was comprised of unitless CT data values representing effective relative attenuation, into porosity space.
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