NaCl crystals slip on {110} slip systems. There are six systems of this type. Consider a crystal subjected to uniaxial compression parallel to z = [110].
A. On which of the {110} slip systems would the shear stress be the highest? that is, on which of the systems would slip be expected?
B. Let the lateral directions be x = [110] and y = [001]. Determine the shape change that occurs as the crystal deforms on one of these systems by ?nding the ratios εy/εz and εx /εz . Describe the shape change in words. [Hint: Analyze one of the slip systems in your answer to (A). Be careful about signs.]