caa a22 4500 386400806 CHVBK 20180307112158.0 cr unu---uuuuu 161130e198912 xx s 000 0 eng 10.1017/S0885715600013701 doi S0885715600013701 pii (NATIONALLICENCE)cambridge-10.1017/S0885715600013701 Microabsorption Correction of X-Ray Intensities Diffracted by Multiphase Powder Specimens [Elektronische Daten] The absorption of X-rays in a heterogeneous material depends on the linear absorption coefficients and volume fractions of the components, and on die geometrical peculiarities of their distribution. The latter is called the microabsorption effect, it can be separated into a bulk and a surface contribution. Within the framework of a well-defined stochastic structure model, the bulk contribution to the microabsorption is calculated for arbitrary random multiphase systems in terms of dependence on volume fractions and mean chord lengths of particles. Expressions are derived which are suitable for eliminating the experimental errors of scattering intensities caused by the bulk contribution of microabsorption. If only one wavelengtii of radiation is used, the mean chord lengths of the phases of the sample must be determined by other experimental techniques. A method is proposed to overcome this difficulty by using two or more wavelengths of radiation; this correction procedure works without the knowledge of the particle sizes of the phases. Copyright © Cambridge University Press 1989 Hermann H. Central Institute of Solid State Physics and Materials Research Dresden, Academy of Sciences of the GDR, Helmholtzstr. 20, Dresden, DDR-8027, E., Germany Ermrich M. Central Institute of Solid State Physics and Materials Research Dresden, Academy of Sciences of the GDR, Helmholtzstr. 20, Dresden, DDR-8027, E., Germany Powder Diffraction Cambridge University Press 4/4(1989-12), 189-195 0885-7156 4:4<189 1989 4 PDJ https://doi.org/10.1017/S0885715600013701 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1017/S0885715600013701 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Hermann H. Central Institute of Solid State Physics and Materials Research Dresden, Academy of Sciences of the GDR, Helmholtzstr. 20, Dresden, DDR-8027, E., Germany NATIONALLICENCE 700 1- Ermrich M. Central Institute of Solid State Physics and Materials Research Dresden, Academy of Sciences of the GDR, Helmholtzstr. 20, Dresden, DDR-8027, E., Germany NATIONALLICENCE 773 0- Powder Diffraction Cambridge University Press 4/4(1989-12), 189-195 0885-7156 4:4<189 1989 4 PDJ CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge