抄録
The absolute value of the ‘forbidden’ (222) structure amplitude of silicon is measured by the Pendellösung method. Traverse topographs from a wedge-shaped, dislocation-free crystal are obtained at room temperature, using Cu Kα1 radiation from a rotating anode generator. From the position of the first maximum of thickness fringes the F(222)e−M value is derived as 1.645±.034.