Springer Online Journal Archives 1860-2000
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Abstract An experimental method is described for the phase determination of x-ray reflections from noncentrosymmetric crystals. This method results from considerations on the phase dependence of line profiles in three-beam reflection-type diffractions for wavelength λ above and below a critical absorption edgeλ E of the heaviest constituent atom in the crystals. A relationS p =S L ·S R for phase determination is derived theoretically and verified experimentally forλ〈λ E ,S p being the sign of the sine of invariant phase,S L the sign defined from the line profile, andS R determined by the rotation of the crystal lattice.
Type of Medium: