Features of quantitative X-ray diffraction analysis of weakly absorbing powder products with a defective structure

The methods of quantitative phase analysis of low-absorbing powders by X-ra y diffraction have been developed. The approach used accounts for the depen dence of line intensify absorption factor on the Bragg angle and sample por osity and thickness. If has been shown that the use of traditional methods without reference to this dependence results in considerable errors in quan titative determination of phase content and in phase structure investigatio n. The application of proposed methods is illustrated by phase analysis of products of boron nitride shock compression.