A new formula for the breadth of debye scherrer lines

Summary A simple and exact formula for the breadth of Debye Scherrer lines is derived, with the assumption that the crystals have the same form and volume. This formula is used to evaluate the integral breadth as a function of the direction of the normal on the reflecting plane for some triclinic crystals. This leads to a partial justification of the Laue formula, at least for those crystals, which approximate an ellipsoid. It is shown that the value of the constant is 1. For a parallelopipedum another formula is given, so it might be possible to distinguish between these two cases. The volume of the crystals may be found from the half intensity breadth with a greater accuracy than from the integral breadth.