Surface microstructures of lunar soil reveal an intermediate stage in space weathering process

A study conducted by a joint team from Chinese Academy of Sciences used aberration-corrected transmission electron microscopy (TEM), Electron-energy loss spectroscopy (EELS) and scanning transmission electron microscopy (STEM) to examine the microstructures and chemical compositions at nano/atomic scales of 25 soil grains (1-3 μm in size) from lunar sample CE5C0400YJFM00507 (1.5 g).