摘要
The intrinsic stacking fault energies of diamond, germanium and grey tin have been calculated by the pseudopotential method to a second order perturbation approximation. The calculated value for germanium, 26 erg/cm 2 , falls within 50% of the experimental value determined by the weak-beam technique in electron microscopy. The value for diamond, questionable because of possible poor convergence of the method, is very large, 1860 erg/cm 2 . Grey tin exhibits a small value, 3 erg/cm 2 , which could in principle be easily measured experimentally. © 1974, Taylor & Francis Group, LLC. All rights reserved.