Patent ID: 6198796
Filing Date: 2001-03-06
Classification: G01N

Abstract:
A method of automatically selecting, using a computer, a reference Bragg reflection pc1 and a reference Bragg reflection pc2 which together form a basis for determination of the crystallographic orientation of a crystal sample by the two-reflection method, said method comprising the steps of:<a> calculating, using crystallographic information given to the computer, x-ray intensities and diffraction conditions of all Bragg reflections which are measurable;<b> assigning a weight-point to each of the Bragg reflections according to the x-ray intensity thereof and the angle .DELTA.G between the sample normal and the scattering vector thereof; and<c> selecting, among the Bragg reflections, one Bragg reflection having the largest weight-point as said reference Bragg reflection pc1 and another Bragg reflection having the second largest weight-point as said reference Bragg reflection pc2.