Fig. 4From: Combination of focused ion beam (FIB) and microtome by ultrathin slice preparation for transmission electron microscopy (TEM) observationMicrostructure of the presolar graphite (Pink-55a). a Consisting of concentric layers. b The area with red box at high magnification. Electron diffraction pattern from the near red circle indicative of poor organization. c High-resolution TEM imaging. Turbostratic layering with contorted lattice planes and short-range layer continuityBack to article page