Tolerable orientation errors in determination of the material constants of crystals

Orientation errors in the crystal units used to study crystal properties affect the accuracy of the calculated material constants. Tolerable orientation errors satisfy two conditions: (1) they do not invalidate the calculation of errors due to experiment; and (2) they do not substantially add to their values. Their values depend on the experiment and the number of crystal units used and can be determined by simulations. In five cases analyzed in detail, they have been found to be in the range between 9\´ and 8"